The Ice Pits of Mars

The Mars Reconnaissance Orbiter snapped this intriguing glimpse of pits (and they are pits, not mounds) in the southern polar ice cap. The ice is made of carbon dioxide (dry ice) and is about 10 feet thick here. The circular pits are about 200 feet across.

 

Sent by: Mars Reconnaissance Orbiter | From: Mars | Released: September, 2011 | Credit: NASA/JPL/UA | Image source

Done