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{\Large ASTR450 Homework \# 4 -- Central Force Motion\\
Due Tuesday, March 7}
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Reading: Finish reading Danby's Chapter 6. You can skim sections 6.6 \&
6.7, and skip sections 6.8-6.13.


1. Danby: Page 136, Problem 2. This is a hard problem. The
relationships between $\nu$, $E$ and $M$ will be useful as will the
discussion and plot on page 133.

2. Danby: Page 136, Problem 6. For what value of q is the time spent
inside 1 AU maximum, and what is the maximum time?  Give a physical
reason for why this value of q is ``reasonable'' (draw a picture).

3. Danby: Page 137, Problem 9. 

4. Danby: Page 137, Problem 12. If we increase Earth's orbital
eccentricity while leaving its semimajor axis constant, does it
receive more sunlight over a year or less?


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