Object 20: A Classic Non-Comet
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Even though it may be rather ordinary from a scientific standpoint, the open cluster Messier 23 is a very popular with amateur astronomers.
Object 20: A Classic Non-Comet
Even though it may be rather ordinary from a scientific standpoint, the open cluster Messier 23 is a very popular with amateur astronomers.
Object 20: A Classic Non-Comet