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Hendrik Klaassens #FBPE #FBR #NAFO@aurorablogspot.bsky.social |
Messier 101, also known als the Pinwheel Galaxy, is a spiral galaxy in the constellation of Ursa Major (the Great Bear). It lies 21 million light-years away from earth. It has a diameter of 170,000 light-years and contains about 100 billion solar masses.
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