The Cliffs of Comet Churyumov Gerasimenko via NASA...

The Cliffs of Comet Churyumov Gerasimenko via NASA http://j.mp/1B4oQPU

http://j.mp/1wjmCrG

from my Tumblr http://j.mp/1A35qwL

December 24, 2014 at 06:50AM