Comet 67P, Floating Beside You in Red/Blue 3D

Comet 67P/Churyumov-Gerasimenko is a jagged lump with two lobes, and NASA's Astronomy Picture of the Day for October 17 hands you red/blue glasses and invites you to float beside it. The stereo anaglyph was made by combining two images from the Rosetta spacecraft's narrow-angle OSIRIS camera, taken on July 25, 2015.

The geometry is the memorable part: a larger lobe about 4 kilometers in diameter, joined by a narrow neck to a smaller lobe about 2.5 kilometers across. A comet shaped like two rocks that met and stayed together is a strange thing to see in three dimensions, and the stereo pair makes the join read as depth rather than as a silhouette.