supermassive black hole
esiegel | February 4, 2013"The thing's hollow—it goes on forever—and—oh my God—it's full of stars!" -Dave Bowman, 2001: A Space Odyssey
Back in October, we began a new, weekly series here called Messier Monday. Each Monday, we've taken a look at one of the 110 deep-sky objects that make up the Messier Catalogue, nebulous objects that might potentially be confused with comets by unaware comet-hunters.
Image credit: Lee Kelvin and Grant Miller, via http://star-www.st-and.ac.uk/~lsk9/.
These objects include stellar remnants, star-forming nebulae, young star clusters, ancient globular clusters, and distant galaxies far…