Friday, December 4, 2009
Some warm astrogeology on a cold winter's day
Gems of pure beauty, found buried in a government website. I'm reformatting and reposting some USGS maps of planetary geology, for your health and enjoyment. They're lovely! Five rocks to choose from: mercury, the moon, mars, io, and ganymede. My thanks to Micah Maltsberger for bringing these to my attention!
Posted by by Bill Rankin