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The Hubble Space Telescope has captured the best view yet of the Andromeda Galaxy's nucleus — which is actually a double nucleus, thanks to the galaxy's supermassive black hole.
Andromeda is the nearest spiral galaxy to our own Milky Way, and the only galaxy outside our own that's visible to the naked eye. But it's not easy to see what's going on at the bright center of the spiral. Astronomer Tod Lauer of the National Optical Astronomy Observatory put together several exposures in blue and ultraviolet wavelengths from Hubble's Advanced Camera for Surveys to produce this ultra-sharp view.
Originally posted by dimethylmercury
"Andromeda is the nearest spiral galaxy to our own Milky Way, and the only galaxy outside our own that's visible to the naked eye."
Surprised by this claim; besides the obvious exceptions of the Magellanic Clouds, the Triangulum Galaxy can be seen with the naked eye under good conditions making it the most distant object that can be seen without aid.
Amazing pictures though, the high resolution zoom was especially impressive!