... Jupiter's Moon Amalthea . ... The unusual geometry of this stellar nebula creates somewhat of a mystery. At the nebula's center is a young binary star system that probably created the nebula, but how? This type of nebula shows a "bipolar flow" which carries a significant amount of mass away from the central stars. M16: Dust and an Open Cluster . ... Comet Hale-Bopp Update . ... It is an emission nebula surrounding a cluster of hot, young stars called the 30 Doradus super cluster. ...