Ch3 - Assignment: Chapter 3 Class: Astronomy I Date: August...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Assignment: Chapter 3 Class: Astronomy I Date: August 29 th , 2007 Review Questions 1. Explain the difference between sunlight and moonlight. The sunlight is simply the light that the sun emits, while the moonlight is the sunlight that has struck the Moon’s surface and reflected to Earth. 2. (a) Explain why the Moon exhibits phases. (b) A common misconception about the Moon’s phases is that they are caused by the Earth’s shadow. Use figure 3-2 to explain why this is not correct. a) The Moon exhibits phases because as the Moon orbits around the Earth from one night to the next, we here on Earth see different amounts of the illuminated half of the Moon by the Sun. b) This common misconception is simply false. The phases are the result of our seeing the illuminated half the Moon at different angles as the Moon orbits around the Earth. 3. How would the sequence and timing of lunar phases be affected if the Moon moved around its orbit (a) in the same direction, but at twice the speed; (b) at the same speed, but in the opposite direction? Explain your answers. a) If the Moon moved around its orbit at twice the speed, the Lunar Phase would also be less than four weeks. b) If the Moon orbited in the opposite direction, we would simply see the Lunar Phase happening in an exact opposite manner, but still seeing the complete phase. 4. At approximately what time does th e Moon rise when it is (a) a new moon; (b) a first quarter moon; (c) a full moon; (d) a third quarter moon? a) A new moon rises around sunrise. b) A first quarter moon rises around noon. c) A full moon rises at sunset. d) A third quarter moon rises around midnight. 5. Astronomers sometimes refer to lunar phases in terms of the age of the Moon. This is the time that has elapsed since new moon phase. Thus, the age of a full moon is half of a 29 ½-day synodic period, or approximately 15 days. Find the approximate age of (a) a waxing crescent moon; (b) a third quarter moon; (c) a waning gibbous moon. a) Age of waxing crescent moon is about 4 days. b) Age of a third quarter moon is about 22 days. c) Age of a waning gibbous moon is about 20 days. 6. If you lived on the moon, would you see the Earth go through phases? If so, would the sequence of phases be the same as those of the Moon as seen from Earth, or would the sequence be reversed? Explain using Figure 3-2. If you lived on the moon, you probably won’t see the Earth go through phases
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/25/2008 for the course ASTRON 1 taught by Professor Jsepikas during the Winter '07 term at Pasadena City College.

Page1 / 4

Ch3 - Assignment: Chapter 3 Class: Astronomy I Date: August...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online