QUIZ #4: Lookback Time; Powers of Ten; Directions; Motions of Objects in the
Sky; Circumference of the Earth
Five questions from class #4 on September 3, 2014
The Crab nebula is ~6000 light-years away. What is our lookback time to this object
QUIZ #2: Course Policies; Think From New Perspectives; Think Proportionally;
Powers of Ten
Six questions from class #2 on August 27, 2014
What fraction of your ASTR grade is determined by daily homework like the one due right now?
QUIZ #9: Angles; Keplers Laws; Martian Seasons; Newtons Laws
Six questions from class #9 on September 15, 2014
Does It Make Sense?
If the Earth rotated on its axis from east-west, there would be no change in our seasons.
1. Yes (CORR
QUIZ #7: Motions of the Sun and Stars; Time of Day on Earth; Seasons
Five questions from class #7 on September 10, 2014
In the following figure, the Sun appears towards the constellation Gemini at noon. Where will it be at
QUIZ #6: Phases of the Moon; Rising and Setting of Celestial Objects; Scale Model
Six questions from class #6 on September 8, 2014
When does a Full Moon rise and set?
1. sunrise, sunset
2. noon, midnight
3. sunset, sunrise
QUIZ #5: Phases of the Moon; Rising and Setting of Celestial Objects; Scale Model
Two questions from class #5 on September 5, 2014
Question #1: From Homework III we learned that about 109 Earths would fit side-by-side across the Suns
Daily Numerical Skills
ASTR 170B1 section 001
"An innumerate citizen today is as vulnerable as the illiterate peasant of Gutenberg's time."
Employers want to hire people who understand numbers and can communicate effectively using numbers.
QUIZ #3: Questions About our Class, Proportional Thinking, and Powers of Ten
Three questions from class #3 on August 29, 2014
The Moon is ~240,000 miles from Earth. The speed of light is 186,000 miles/sec. What is our lookback
time to the Moo
QUIZ #8: Area; Seasons; How Earths Tilt Causes Our Seasons; Tycho Brahe
Four questions from class #8 on September 12, 2014
What time(s) of day would people on the left curve of the Earth experience at the Tropic of Cancer,
Equator, and Tropic