AST101PPT(exam1)

AST101PPT(exam1) - Welcome to Astronomy 101 Prof Duncan...

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Unformatted text preview: Welcome to Astronomy 101 Prof Duncan Brown Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Announcements • Please pick up a copy of the syllabus and a “paper clicker” • Make sure you check for course announcements at http://blackboard.syr.edu Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Homework • Homework is available from the Mastering Astronomy web page http://www.masteringastronomy.com • You use this site to complete and submit your homework problems Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Getting an account Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • If you purchased the Lecture Tutorials from the SU Bookstore you should have an access code • If not, you can purchase one online Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • If you purchase online, chose any textbook • Say NO to the eText option Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • You should then be asked for a course ID This can be found in your syllabus • Finally, enter your SU NetID when prompted Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • The first homework is a practice at using Mastering Astronomy • Make sure you know how the web site works before next week’s homework assignment! • The web site will not accept late homework... Do not leave it until the last minute in case you have technical problems! Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Labs • Labs are full, so you must attend your assigned lab section • TAs will start enforcing this next week • There are no labs next Monday due to Labor Day • The lab schedule is in the syllabus • Lab times are posted on the door of the lab (Physics Building B-129E or W) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Lab Manual • You should have purchased a copy of the Lab Manual • Bring your Lab Manual to all labs • We’ll start using it next week! • You may also want to bring your laptop to lab Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Pre-Lab Exercise Check the “Laboratory” section on Blackboard Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Lecture Tutorials • You should have purchased a new copy of the Lecture Tutorial Book • Bring your Lecture Tutorial book to all lectures • We’ll start using it on Thursday! Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Exams... Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • There are three mid-term exams and one final exam • Dates are given in the syllabus • There are no make up exams, so please don’t make travel plans that interfere with the exam dates • You can drop one mid-term or the homework, but the final exam is mandatory Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Why study astronomy? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Write down three things you can tell about this star cluster just from looking at this photograph Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Thinking About Science • Gather information about the Universe through observations and experiments • Organize the information we gather • Develop theories to explain observations and predict future observations • Test these theories with more observations Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. How do we know that the Earth is round? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • During a lunar eclipse, the moon passes through the Earth’s shadow • The edge of the shadow is curved • Pythagorus deduced that the Earth was round Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. August 16, 2008 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. How big is the Universe? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Astronomical numbers • Light travels at 300,000,000 meters per second • There are 100 billion stars in our galaxy • The nearest star to the sun is 24 trillion miles away... Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Units in Astronomy • One Astronomical Unit is the average distance from the Earth to the Sun • 1 AU = 1.4 x 1011 meters • Light travels at 3 x meters per second • One light year is the distance light travels in 8 10 one year • 1 ly = 9 x 1015 meters Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Paper Clickers A B C D Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. A light year is... • A. • B. • C. an interval of time a measure of length an indication of speed The nearest star to the Sun is 4.2 ly away Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Andromeda Galaxy is about 2,000,000 ly away. Thus, the light that we observe from Andromeda was emitted... • A. • B. • C. • D. Just a second ago 2,000,000 years ago One year ago Can’t be determined Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Crab Nebula is the remnant of an exploded star. The explosion was witnessed by Chinese astronomers in the year 1054 AD. The Crab nebula is 6500 ly away. This means that the explosion occurred in the year... • A. • B. • C. • D. 6500 BC 5446 BC 1054 BC 1054 AD Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. 1m Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. 10 m Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. 100 m Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. 1,000,000m 100,000mm 10,000m 1000 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. In the organizational diagram below, the term Earth would most appropriately fit in the area labeled...? (A) Solar System (B) Milky Way (C) Universe Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. In the organizational diagram below, the term Virgo supercluster would most appropriately fit in the area labeled...? (A) Solar System (B) Milky Way (C) Universe Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. In the organizational diagram below, the term Big Dipper constellation would most appropriately fit in the area labeled...? (A) Solar System (B) Milky Way (C) Universe Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Next time: The Night Sky Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Welcome back to Astronomy 101 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • It is very important that you learn about traxoline • Traxoline is a new form of zionter • It is made in Ceristanna • Ceristanna contain large amounts of fevron which is brachtered to make traxoline Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Participation Credit Answer the following in whole sentences on a card: 1. What is traxoline? 2. How is traxoline made? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Reminders... • Bring your Lecture Tutorial book to all lectures • We’ll start using it today Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Night Sky Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • Stars are all different sizes and distances from us • But they are very far away so they appear as points in the sky Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • When we look at the night sky, the stars appear to lie on a dome above our heads • We lack depth perception when looking at things this far away Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Celestial Sphere Stars appear to lie on the celestial sphere, but really they are at different distances from the Earth Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • The stars in our galaxy are moving at hundreds of km/s... • ...but they are so far away that we cannot see any movement in our lifetime • The stars appear fixed on the celestial sphere Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Celestial Sphere Model North Celestial Pole Earth’s North Pole Polaris Stars appear to lie in fixed positions on the celestial sphere Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • We can only see the part of the celestial sphere that is above our horizon • We call this our local sky Zenith (directly overhead) Horizon Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. How much of the celestial sphere can an Earth observer see at one time? • A. Less than half • C. More than half • B. Exactly half • D. All of it Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Where would you have to be for Polaris to be at your zenith? • A. Syracuse, NY • C. The Equator • B. The North Pole • D. Sydney, Australia Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. North Celestial pole Zenith (directly overhead) Polaris (the North star) Horizon • In Syracuse (latitude of 42° N) the celestial pole is 42° above the Northern horizon • It is high in the northern sky Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Directions in astronomy Zenith North High East Low South Horizon West Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Zenith The local sky facing North Polaris North West East South • A. High in the Polaris is... • C. High in the • B. Low in the • D. At the zenith western sky northern sky northern sky Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. In the Celestial Sphere model the Earth is fixed and the stars appear to rotate around the Earth Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Position, pages 1-2 • • Work with a partner • Discuss the concepts with one another • Come to a consensus answer you both agree on Read the instructions and questions carefully Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Star B 2 Polaris 2 Star A 3 East 4 North South West The local sky facing East Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Polaris Star A What direction should you face to see Star A when it is highest in the sky? (A) North (B) South (C) East (D) West Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Star B Polaris Star A Which of the stars will set below the horizon? • A. Star A • B. Star B • C. Both A and B • D. Neither A nor B Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Star B at position 4 Depending on your latitude some stars never set. These are called circumpolar stars. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Where would you have to be for all stars to be circumpolar? • A. The North Pole • B. The Equator • C. • D. Sydney, Australia Syracuse, NY Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. What direction was the photographer looking in this picture of Joshua Tree National Park, California? • A. • B. North South • C. • D. East West Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. An observer in Syracuse, NY (latitude = 42° N) sees three stars rising on the eastern horizon. Which of these stars might later pass through the zenith point? (A) (B) (C) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. East What causes the observed celestial motion? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Welcome back to Astronomy 101 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Motion Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • The Earth orbits the Sun at 100,000 km/hr • The Earth orbits the sun in the ecliptic plane The Earth’s axis points towards Polaris The average Earth-Sun distance is 1 AU 23.5° Earth takes one year to orbit the Sun Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • The Galaxy rotates at 800,000 km/hr • The Sun takes 230 million years to orbit the center of the Milky Way 28,000 light years • Local stars move randomly with respect to each other Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Celestial Sphere Model The Earth is stationary and the stars appear to move on a sphere that rotates about this axis Stars all appear to lie on in fixed positions the celestial sphere Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • When we are looking at the sky the two motions that dominate what we see are: • The daily rotation of the Earth about its axis • The annual revolution of the Earth around the Sun Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Daily Motion Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Rotation of the Earth North Pole • The Earth rotates from west to east • West East This makes the celestial sphere appear to rotate around us from east to west South Pole Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • Since the celestial sphere appears to be rotating from east to west, stars rise in the east and set in the west • This is true wherever you are on Earth! Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Question How much time has passed in the above animation? • A. One day • C. One week • B. One month • D. One year Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Stars appear to rotate around the celestial poles once per day Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. In the northern hemisphere the north celestial pole is above the horizon. al ti C es el or at The south celestial pole is below the horizon. qu E Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • Viewed from above the North Pole the Earth appears to rotate counterclockwise • Viewed from above the South Pole the Earth appears to rotate clockwise Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Stars appear to rotate counter-clockwise around the North Celestial pole Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Stars appear to rotate clockwise around the South Celestial pole Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. What direction was the photographer looking in this picture of Joshua Tree National Park, California? • A. • B. North South • C. • D. East West Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. A star is on the north point of the horizon. Where will the star be in 6 hours? (C) (D) (B) Polaris (A) North Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. (A) (B) Polaris Horizon Which of these stars is circumpolar? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Where would you have to be for all stars to be circumpolar? • A. The North Pole • B. The Equator • C. • D. Sydney, Australia Syracuse, NY Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. (A) (B) Polaris Horizon Which star is visible for the longest amount of time? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. (B) Polaris (A) Horizon Which star is visible for the longest amount of time? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Participation Credit • Answer the question on your index card • Make sure you carefully explain your reasoning • Write your name and SUID on your card and put it in the boxes by the doors at the end of class Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. What about the Sun? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • Earth’s daily rotation makes the Sun appear to rise and set once per day Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • The Sun also appears to lie on the celestial sphere • The Sun is highest in the sky at noon • In the Northern Hemisphere, the sun appears high in the southern sky at noon • Over the course of one day, the Sun appears (almost) fixed with respect to the stars Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Motion, pages 3-6 • • Work with a partner • Discuss the concepts with one another • Come to a consensus answer you both agree on Read the instructions and questions carefully Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. How much time is there between when a star rises and when it sets? • A. less than 12 hours • B. about 12 hours • C. more than 12 hours • D. it depends on the star Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. You are looking toward the north and see the Big Dipper to the right of Polaris. Fifteen minutes later, the Big Dipper will appear to have moved in roughly what direction? • A. East (to the right) • B. West (to the left) • C. Up (away from the horizon) • D. Down (towards the horizon) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. An observer in Syracuse, NY (latitude = 42° N) sees three stars rising on the eastern horizon. Which of these stars might later pass through the zenith point? (A) (B) (C) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. East Imagine you are standing in the Northern Hemisphere. Looking directly north, you see a star just above the horizon. A little later, you notice that it has shifted position slightly. Which way did it move? • A. • B. to the right (east) to the left (west) • C. • D. up (rising) down (setting) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Imagine you can see the stars during the day. The image below shows the Sun among the stars of the constellation Leo. What time is it? • A. • B. midnight noon • C. • D. 6 am 6 pm Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Imagine you can see the stars during the day. The image below shows the Sun among the stars of the constellation Leo. What constellation will the Sun be in at 6 pm? • A. • B. Libra Leo • C. • D. Gemini Cancer Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. See you next time... Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Welcome back to Astronomy 101 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Figure 1 on page 3 Describe where you would look to see Star B at 6pm • A. high in the sky • B. low in the sky Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Figure 2 on page 3 Which compass direction are you facing? ! • A. • B. North South • C. East • D. West Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Figure 2 on page 3 Are you pointing high or low in the sky? ! • A. High • B. Low Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Figure 2 on page 3 North West East South ! Are my labels in this diagram correct? • A. Yes • B. No Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Figure 2 on page 3 Zenith East North West South Are my labels in this diagram correct? ! • A. Yes • B. No Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Figures 1 and 2 show the same thing from different views ! Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Motion, pages 3-6 • • Work with a partner • Discuss the concepts with one another • Come to a consensus answer you both agree on Read the instructions and questions carefully Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. How much time is there between when a star rises and when it sets? • A. less than 12 hours • B. about 12 hours • C. more than 12 hours • D. it depends on the star Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Imagine you are standing in the Northern Hemisphere. Looking directly north, you see a star just above the horizon. A little later, you notice that it has shifted position slightly. Which way did it move? • A. • B. to the right (east) to the left (west) • C. • D. up (rising) down (setting) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. You are looking toward the north and see the Big Dipper to the right of Polaris. Fifteen minutes later, the Big Dipper will appear to have moved in roughly what direction? • A. East (to the right) • B. West (to the left) • C. Up (away from the horizon) • D. Down (towards the horizon) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. An observer in Syracuse, NY (latitude = 42° N) sees three stars rising on the eastern horizon. Which of these stars might later pass through the zenith point? (A) (B) (C) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. East Stars north of the celestial equator appear to rotate counterclockwise around the north celestial pole al ti C es el qu E or at Stars south of the celestial equator appear to rotate clockwise around the south celestial pole Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The following movie shows stars for a mid-lattitude observer in the _______ hemisphere looking _____ (A) Northern, East (B) Northern, West (C) Southern, West (D) Southern, East Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The following movie shows stars for a mid-lattitude observer in the _______ hemisphere looking _____ (A) Northern, East (B) Northern, West (C) Southern, West (D) Southern, East Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The following movie shows stars for a mid-lattitude observer in the _______ hemisphere looking _____ (A) Northern, North (B) Northern, South (C) Southern, North (D) Southern, South Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The following movie shows stars for a mid-lattitude observer in the _______ hemisphere looking _____ (A) Northern, N.E. (B) Northern, S.E. (C) Southern, S.E. (D) Southern, N.E. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Annual Motion Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • Due to the Earth’s orbital motion, the Sun does not appear to be fixed on the celestial sphere • The Sun’s position with respect to the constellations gradually changes over a year Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Celestial Sphere Model The Earth is stationary and the stars are carried on a sphere that rotates about this axis once each day The ecliptic is the Sun’s apparent path around the celestial sphere Stars all appear to lie on in fixed positions the celestial sphere The celestial equator is the projection of the Earth’s equator into space Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Question How much time has passed in the above animation? • A. One day • C. One week • B. One month • D. One year Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Question Approximately many rotations would the celestial sphere have made in the time shown in the above animation? • A. • B. Half One • C. • D. 183 365 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • We divide the stars that lie near the ecliptic into 12 constellations • These are the constellations of the zodiac • The Sun appears to move through one constellation per month Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Welcome back to Astronomy 101 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Seasonal Stars Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • As the Earth moves around the Sun, different stars visible at different times of the year • Orion is visible in the winter, but not the summer Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. We have to face away from the Sun to see particular stars December May Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • The stars are always present in the sky • Light from the Sun obscures different stars at different times of the year • The constellations visible at a particular time of night change as we orbit the Sun • Stars rise and set times depend on their location on the celestial sphere Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Seasonal Stars pages 7-9 • • Work with a partner • Discuss the concepts with one another • Come to a consensus answer you both agree on Read the instructions and questions carefully Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Suppose I asked you to demonstrate why we see different stars at different times of the year. The dotted circle represents the Earth’s orbit around the Sun. Which group of students is correctly demonstrating the reason why we see different constellations in the night sky in summer than in winter? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. One night, you see the star Sirius rise at exactly 7.36 pm. The following night it will rise... • A. slightly earlier • C. • B. at the same time • D. it will not be visible slightly later at all Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. What component of the Earth’s motion cause the stars to rise earlier and earlier on successive nights? • A. • B. • C. • D. its rotation about its axis its orbit around the Sun the tilt of its rotation axis its motion with respect to nearby stars Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. One evening at midnight, you observe Leo high in the southern sky at midnight. Virgo is to the east of Leo and Cancer is to the west. One month earlier, which of these constellations was high in the southern sky in at midnight? • A. Leo • B. Virgo • C. Cancer Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Question Approximately how many rotations would the celestial sphere have made in the time shown in the above animation? • A. • B. Half One • C. • D. 183 365 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Ecliptic pages pages13-17 • • Work with a partner • Discuss the concepts with one another • Come to a consensus answer you both agree on Read the instructions and questions carefully Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Imagine you can see the stars during the day. The image below shows the Sun among the stars of the constellation Leo. What time is it? • A. • B. midnight noon • C. • D. 6 am 6 pm Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Imagine you can see the stars during the day. The image below shows the Sun among the stars of the constellation Leo. What constellation will the Sun be in at 6 pm? • A. • B. Libra Leo • C. • D. Gemini Cancer Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Imagine you can see the stars during the day. The image below shows the Sun among the stars of the constellation Leo. How long will it be until the Sun is in Virgo at noon? • A. • B. 3 hours 1 day • C. • D. 1 month 1 year Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. After the Sun leaves the constellation Sagittarius, how long until it returns to this constellation? • A. • B. • C. • D. One day One month Six months One year Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Solstices and Equinoxes Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • In the Northern hemisphere, the Sun is in the southern sky at noon • In summer, the Sun rises north of east and is high in the southern sky at noon • In winter, the Sun rises south of east and is low in the southern sky at noon Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • The summer solstice (June 21) is the day when the sun reaches its highest point in the sky at noon • The winter solstice (December 21) is the day when sun reaches at its lowest point in the sky at noon Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • On the two equinoxes, day and night are equal length • We have a spring (March 21) and a fall (September 21) equinox • The Sun rises due east and sets due west Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Welcome back to Astronomy 101 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Solstices Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Equinoxes Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The photo shows a street in mid-town Manhattan, where the streets run North-South and East-West What day of the year is it? • A. • B. • C. June 21 December 21 March 21 or September 21 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. As seen from Syracuse, NY, when will an upright flagpole cast no shadow because the Sun is directly above the flagpole? • A. • B. • C. • D. Every day at noon On the first day of summer On both the first days of spring and fall Never Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. How often is the Sun directly over the Earth’s equator? • A. • B. • C. • D. Once a day Once a month Once every six months Once a year Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Sun at the Zenith • The sun is directly above the Tropic of Cancer at noon on the summer solstice • The sun is directly above the Equator at noon on the equinoxes • The sun is directly above the Tropic of Capricorn at noon on the winter solstice Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. What day is it in the image shown? • A. • B. June 21 December 21 • C. March 21 or September 21 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. What day is it in the image shown? • A. • B. June 21 December 21 • C. March 21 or September 21 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The image below shows a stick illuminated by the Sun when the Sun is low in the north-west sky. What is the direction of the shadow? • A. • B. North-west South-east • C. • D. North-east South-west Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The image below shows a stick illuminated by the Sun when the Sun is low in the north-west sky. It is _________ in the _________. • A. • B. evening, summer morning, summer • C. • D. evening, winter morning, winter Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Path of the Sun pages 87-90 • • Work with a partner • Discuss the concepts with one another • Come to a consensus answer you both agree on Read the instructions and questions carefully Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. In the celestial sphere model, the Sun’s position along the western horizon at sunset changes because... • A. Earth is stationary • B. The stars rotate with the celestial sphere • C. The tilt of the Earth changes throughout the year • D. The position of the Sun along the ecliptic is constantly changing Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. On September 22, the Sun sets directly to the west. Where would the Sun appear to set 2 weeks later? • A. • B. • C. Farther south In the same place Farther north Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. One method of determining direction is to use a vertical pole and the shadow cast by the sun. An astronomy student in Syracuse places a rock at the end of the pole’s shadow every 15 minutes. The arrow points... • A. • B. North South • C. • D. East West Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The image below shows a stick illuminated by the Sun at noon on the winter solstice. The red star shows the length of the stick’s shadow on the summer solstice. Which other star shows a possible position of the Sun’s shadow at noon? (D) (C) (B) (A) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Seasons Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Average Monthly Temperature in Cordoba Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Average Monthly Temperature in Syracuse Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Why does direct Sunlight matter? Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Northern Hemisphere gets more direct sunlight Summer Northern Hemisphere tilted towards the Sun Northern Hemisphere gets less direct sunlight Winter Northern Hemisphere tilted away from the Sun Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Muddiest Point Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Welcome back to Astronomy 101 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Earth’s orbit around the Sun is shown below (not to scale). Which position corresponds to March 21? (A) (B) (D) (C) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. If the Earth were tilted at 60° (rather than 23.5°) then during winter you would... • A. • B. • C. Experience cooler temperatures Experience warmer temperatures There would be no significant change in temperature Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Imagine the Earth’s orbit were changed to be a perfect circle about the Sun, so the distance from the Earth to the Sun never changed. How would this affect the seasons? • A. • C. • B. • D. we would no longer experience a difference between the seasons the seasons would be the same as they are now we would still experience seasons, but they would be less noticeable we would still experience seasons, but they would be more noticeable Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Moon Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Which of these pictures show a physically realistic diagram of the Sun’s rays hitting the Earth? (A) (B) (D) All of them Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. (C) • The moon orbits the Earth once every 27.32 days • The Moon rotates counterclockwise about the Earth (as viewed from above the North pole) • The Moon appears to lie on the celestial sphere Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Phases of the Moon • Half the Moon always illuminated by the Sun • The amount of the illuminated half we see depends on the Moon’s position in its orbit Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. First Quarter Waxing Gibbous Waxing Crescent New Moon Full Moon Waning Gibbous Waning Crescent Third Quarter Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Causes of Moon Phases pages 79-81 • • Work with a partner • Discuss the concepts with one another • Come to a consensus answer you both agree on Read the instructions and questions carefully Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. During the new moon phase, how much of the Moon’s surface is being illuminated by sunlight? • A. none of it • C. half • B. less than half • D. all of it Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. During the full moon phase, how much of the Moon’s surface is being illuminated by sunlight? • A. none of it • C. half • B. less than half • D. all of it Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The diagram below illustrates the geometry of lunar phases with the moon shown in eight positions in its orbit. Which position corresponds to a first quarter moon? (B) (C) (A) (D) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The diagram below illustrates the geometry of lunar phases with the moon shown in eight positions in its orbit. Which position corresponds to a waxing crescent moon? (B) (A) (C) (D) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The diagram below illustrates the geometry of lunar phases with the moon shown in eight positions in its orbit. Which position corresponds to a waxing crescent moon? (B) (A) (C) (D) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Which of the following best describes why the moon goes through phases? • A. Earth’s shadow falls on different parts of the Moon at different times • B. The amount of the moon illuminated by the Sun changes over the course of a month • C. The sunlight reflected from Earth lights up the moon differently at different times of the month • D. We only see part of the lit-up Moon depending on its position relative to the Earth and Sun Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Participation Credit • Answer the question on your index card • Make sure you carefully explain your reasoning • Write your name and SUID on your card and put it in the boxes by the doors at the end of class Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The time interval corresponding to the length of the lunar phase animation shown is... (A) 4 days (B) 10 days (C) 14 days (D) 28 days Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The time interval corresponding to the length of the lunar phase animation shown is... (A) 4 days (B) 7 days (C) 10 days (D) 14 days Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The time interval corresponding to the length of the lunar phase animation shown is... (A) 4 days (B) 7 days (C) 10 days (D) 14 days Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • The Moon is rotating, just like the Earth • If the Moon was not rotating, we would see different parts of the Moon over a month • It takes exactly the same time for the Moon to rotate as it does for the Moon to orbit the Earth Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. • We always see the same side of the moon! Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The “far side of the moon” is the side of the moon facing away from the Earth. Is the far side of the moon always dark? • A. Yes • B. No • C. It is impossible to tell Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The “dark side of the moon” is the side of the moon facing away from the Sun. Does the dark side of the moon always face away from Earth? • A. Yes • B. No • C. It is impossible to tell Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Welcome back to Astronomy 101 Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Earth’s orbit around the Sun is shown below. Which location corresponds to winter in the southern hemisphere? (A) (B) (C) (D) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Is the moon ever visible during the day? • A. • B. Yes No Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. The Lunar Cycle also affects the time at which the moon rises and sets Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Rises at noon Sets at midnight 6pm Rises at 6pm 12am Sets at 6am W 12pm 6am E Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. You observe a full moon rising in the east. Which image shown best represents how the Moon will appear when it sets? (A) (B) (C) (D) Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Predicting Moon Phases pages 83-85 • • Work with a partner • Discuss the concepts with one another • Come to a consensus answer you both agree on Read the instructions and questions carefully Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. What time is it when the moon phase shown at right first begins to rise above the horizon? • A. • B. midnight 6 am • C. noon • D. 6 pm Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. 6pm 12am 12pm 6am Rises at midnight Sets at noon Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. What phase of the Moon rises at 9am? • A. • B. waning gibbous third quarter • C. first quarter • D. waxing crescent Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Rises at 9am Sets at noon 6pm 9pm 3pm 12am 12pm 9am 6am Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Which phase of the Moon rises in the east as the Sun sets in the west? • A. • B. first quarter new • C. full • D. third quarter Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. Participation Credit • Answer the question on your index card • Make sure you carefully explain your reasoning • Write your name and SUID on your card and put it in the boxes by the doors at the end of class Copyright 201 Duncan Brown. Copyright images used under "fair use" (17 United Stated Code, Section 107). Distribution or reproduction of this material outside blackboard.syr.edy is prohibited. ...
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