Apod 4.8

http://apod.nasa.gov/apod/image/1305/lemmon_rhemann_960.jpg

This is an image of Comet Lemmon. Shown in the image are two tails of the comet, a dust tail and an ion tail. The dust tail is an off-white color, while the ion tail is more visible and blue. The greenish color surrounding the comet's nucleus is caused by C2 gas fluorescing sunlight.