Comet Hartley 2

Explanation: This enhanced image, one of the closest taken of comet Hartley 2 by NASA's EPOXI mission, shows jets and where they originate from the surface. There are jets outgassing from the sunward side, the night side, and along the terminator. The image was taken by EPOXI's Medium-Resolution Instrument on Nov. 4, 2010. The sun is to the right.

Pluto

Image credit: NASA/JPL-Caltech/UMD.