NASA’s Wide-field Infrared Survey Explorer (WISE) took this picture of a comet during its ongoing infrared survey of the whole sky. The Siding Spring comet, also known as C/2007 Q3 was an Aussie discovery and is comprised of a snowball-like mass of ice and dust.  It is believed that this comet spent billions of years orbiting in the very cold Oort Cloud but was then knocked out of its old orbit and moved closer to the sun. The heat then warmed the comet and lead to it shedding the ice and dust in a long tail, which trails behind it. The comet appears red because it is still more than ten times colder than the stars around it.