The Milky Way has a history of devouring its neighbors, the smaller satellite galaxies that orbit it. Over time our galaxy’s gravity will tug on the near sides of these satellites more strongly than their far sides, slowly stretching them out until they tear apart and their stars assimilate into the Milky Way.
Like most star clusters, hypervelocity globular cluster 1 (HVGC-1) once belonged to a galaxy, but this unlucky object is now destined to wander the cosmos alone.
The Andromeda galaxy holds a particular fascination.
Do yourself a favor. Don't read this article just yet--first, take a moment to zoom around this incredible panorama of our galaxy and soak in the splendor: http://www.spitzer.caltech.edu/glimpse360/aladin.
Green as a color can mean animal, vegetable or mineral. It is the stuff of crocodiles, chlorophyll and copper patina, the essence of serpentine or of snakes in the grass, the hue of a glacial lake, a stagnant pond and the Chicago River on St.
Once part of the M87 galaxy, the star cluster HVGC-1 was ejected and is now speeding away at more than two million miles per hour