1. A Cold Solar Nebula
Problem 2, Ch. 8 in the text (p. 235)
2. A Backward Planet
Problem 7, Ch. 8 in the text (p. 236)
3. Water on Mars
It has been known for several decades that water existed on Mars'
surface perhaps a billion years ago. Recent images from the Mars Global Surveyor spacecraft
indicate that water has been at the surface much more recently.
Discuss (1 page or so) some of the evidence for recent liquid
water. Do you believe this evidence? What new results could shift the
debate one way or the other? You may wish to visit the Science website or space.com
for more information.
Last modified 27-Jun-2000