Familiar friend … this optical view from a ground-based telescope shows the Andromeda Galaxy (M31) in a more familiar light.
(Image: Bill Schoening, Vanessa Harvey/REU program/NOAO/AURA/NSF)
M31 lies 2.5 million light-years away in the constellation Andromeda and is the nearest large spiral galaxy to our own. Under a clear, dark sky, it can be seen as a misty patch with the naked eye. (Image: Bill Schoening, Vanessa Harvey/REU program/NOAO/AURA/NSF)
Pretty as a picture … this mosaic of M31 merges 330 individual images taken by the ultraviolet optical telescope aboard NASA's Swift spacecraft. The image shows a region 200,000 light-years wide and 100,000 light-years high.
(Image: NASA/Swift/Stefan Immler (GSFC) and Erin Grand (UMCP))
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