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CIRCLE WITH A DOT

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  3. M21 is an open cluster located about 3900 ly away in the constellation of Sagittarius.

M21 is an open cluster located about 3900 ly away in the constellation of Sagittarius.

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  • evilscientistca@mstdn.caE This user is from outside of this forum
    evilscientistca@mstdn.caE This user is from outside of this forum
    evilscientistca@mstdn.ca
    wrote last edited by
    #1

    M21 is an open cluster located about 3900 ly away in the constellation of Sagittarius.

    At only 6.6 million years old the cluster will still have more massive, hot stars among the longer lived less massive, cooler stars.

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