National Radio Astronomy Observatory (NRAO): The most luminousLuminousIn astronomy, luminosity is an actual unit. It's the amount of energy given off by a star or galaxy, or any other object -- over a specific period of time. "Brightness," in astronomy, is how apparently bright an object appears to an observer. Brightness goes down with distance. Luminosity does not. galaxy in the universe has been caught in the act of stripping away nearly half the mass from at least three of its smaller neighb...
National Radio Astronomy Observatory (NRAO): The most luminousLuminousIn astronomy, luminosity is an actual unit. It's the amount of energy given off by a star or galaxy, or any other object -- over a specific period of time. "Brightness," in astronomy, is how apparently bright an object appears to an observer. Brightness goes down with distance. Luminosity does not. galaxy in the universe has been caught in the act of stripping away nearly half the mass from at least three of its smaller neighb...
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