Discovery of Ixion

Explanation: The May 22, 2001, discovery image for the large Kuiper Belt Object 2001 KX76 (now known as 28978 Ixion) was produced by combining two exposures from the 4-meter Blanco Telescope at CTIO in such a way that moving objects appear as red-colored pairs of images. Ixion is the bright red-cyan pair of dots at the center of the picture. Non-moving objects, such as stars and galaxies, appear white in the picture.

Pluto

Image credit: Deep Ecliptic Survey Team/NOAO/AURA/NSF.