Astronomy 100 - Problem Set 3
Due: Tuesday 26 February 2008
Name:

Fill in the box with the correct answer (answers should be just a few words or a number).

  1. In what part of the Moon's shadow are you if you can see a partial solar eclipse?

    The following six answers refer to the figure at the end of this problem set.

  2. What is the phase of the moon?

  3. What time is it (approximately) at points A, C, and D?

    A

    C

    D

  4. Which observer is watching the Moon set? and what time is it for this observer?

  5. The gravitational force that the Earth exerts on the Moon is equal to 1.98 x 1020 Newtons. What is the gravitational force that the Moon exerts on the Earth? (HINT: Remember Newton's Third Law.)

  6. According to Newton's gravitational force equation, how much smaller or larger is the Sun's gravitational force on Jupiter than the Sun's gravitational force on Earth? Jupiter is 300 times more massive than the Earth and 5 times as far away from the Sun.