NASA's WISE mapped the night sky in infrared light, resulting in the discovery of a myriad of new astronomical objects and bodies. More appropriately named the Wide-field Infrared Survey Explorer, WISE's one-year mission has turned up these twenty comets: as NASA calls it a 'family portrait.' Although this picture (or pictures) aren't in the clearest resolution (they were taken in infrared), the backgrounds are a bit fuzzy due to random fluctuations in infrared light (which is dust in out solar system). You can't see stars because "they were subtracted during the process of combining multiple WISE pictures to make this view centered on the moving comets." NASA writes.