... Flanked by two bright stars, Mu and Eta Geminorum, at the foot of a celestial twin, the Jellyfish Nebula is the brighter arcing ridge of emission with dangling tentacles below and right of center. ... M72: A Globular Cluster of Stars . ... Back in the old days, back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy. ... Mimas, one of the smaller round moons of Saturn, sports Herschel crater, one of the larger impact craters in the entire Solar System. ...