CG4: A Ruptured Cometary Globule Credit & Copyright: T. A. Rector ( U. Alaska ), T. Abbott, NOAO, AURA, NSF Explanation: Can a gas cloud eat a galaxy? It's not even close. The odd looking "creature" in the center of the above photo is a gas cloud known as a cometary globule. This globule, however,... Sign in to see full entry.