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M81: Bode's Nebula was not discovered to be a galaxy until the early 20th century. The spiral arms of this galaxy are especially pronounced (as with M51) due to a recent interaction between it and a neighboring galaxy (M82). At a distance of 12 million light years, this is one of our closest and brightest galaxies. 9 exposures per color filter and 17 exposures luminance. 60 seconds each. Combined using LRGB. |
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