# ASTR630 Planetary Science, Fall 2010 Homework Assignment #3

The new book has a different numerical value for problem 3.4I than the old book- the other problems are identical in both editions.

1. Problem 3.4.I For part b), calculate the ISM temperature with the information given in the problem. How realistic is the number that you get for the ISM temperature?

2. Problem 3.12.E Calculate Jupiter's equilibrium temperature and compare with the result quoted in Table 4.2.

3. Problem 3.14.I You can treat the effects separately as follows. Calculate dT, the maximum change in Earth's average temperature for four effects: 1) reflected sunlight from the full moon, 2) emitted IR from the full moon, 3) change in Earth's position due to motion around the Earth-Moon barycenter, and 4) change in Earth's position due to our planet's orbital eccentricity. For all cases, your dTs should be relative to Earth on a circular orbit with no Moon. Compare your dTs and discuss. As always, state any approximations that you make.

4. Problem 4.13.E Compare your results to any that you find in the book.

5. Problem 4.14.I The hint is a bit confusing. Let units help guide you through this one ...