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  • northern w:constellation of w:Lyra, and also catalogued as Messier 57, M57 or NGC 6720. It is one of the most prominent examples of the deep-sky objects called...
    12 KB (1,468 words) - 22:08, 27 September 2019
  • The Whirlpool Galaxy (also known as Messier 51a, M51a, or NGC 5194) is an interacting grand-design w:spiral galaxy located at a distance of approximately...
    724 bytes (9,852 words) - 23:11, 11 September 2018