Astronomy 110 Homework Assignment #2

Due September 18th, 2012

Name: _________________________________________________

In the diagram below we show the Moon in four positions in its orbit around the Earth. Note that from above the North Pole of the Earth, the Moon moves in a counter-clockwise direction.

 

1. Shade in the dark side hemisphere of the Moon, and label the four positions with the correct name for the phases as seen from the Earth (8pts)

2. Explain why we do not see a solar eclipse at every New Moon, and why there is not a lunar eclipse at every Full Moon (it is the same reason for both!). (10pts)

3. What are the dates for the Next Full Moon and the Next New Moon? How many days separate these two phases? Does this make sense? (7 pts)