A cluster of stars named Westerlund 1, one of the most massive young star clusters known to reside in the Milky Way. [1838 x 1929] via /r/spaceporn https://ift.tt/2KVru6Y
via Tumblr https://ift.tt/2rkLsiq
A cluster of stars named Westerlund 1, one of the most massive young star clusters known to reside in the Milky Way. [1838 x 1929] via /r/spaceporn https://ift.tt/2KVru6Y
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