Starship Asterisk*

If you really want to know the answer, get in touch via this web site with the Cassini outreach team. They _may_ get an answer for you.

http://saturn.jpl.nasa.gov/news/contact-us.cfm

Yes, because you see a crescent only when the other body is between you and the sun, but not in a totally straight line, and that never happens with any planet farther out than earth, as the sun is never "behind it" relative to us. As a school teacher, you might try showing kids how the ph...

I worked on Magellan (Venus), and currently work on Cassini. Magellan had an altimeter, Cassini/Huygens does not. Thus the difference in ability to get altitude information.