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About This Image
M81, a spiral galaxy similar to our own Milky Way, is one of the brightest galaxies that can be seen from Earth. The spiral arms wind all the way down into the nucleus and are made up of young, bluish, hot stars formed in the past few million years, while the central bulge contains older, redder stars.
Credit: NASA, ESA, and The Hubble Heritage Team (STScI/AURA)
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