APOD 4.8

This picture, "The Elusive Jellyfish Nebula" is a very interesting one. The nebula itself is described as elusive because it is usually very faint and therefore it is hard to find. This picture is in false-color and it shows the arcing ridge of emission and its dangling "tentacles." The nebula contains two bright stars, Mu and Eta Geminorum. This nebula is supposed to be part of the bubble-shaped supernova remnant IC 443. The Jellyfish Nebula is about 5,000 light-years away, and so this image is about 300 light-years across. The false color shows emissions from oxygen, hydrogen, and sulfur atoms in blue, green and red colors