Messier and Mechain both made nearly simultaneous discoveries of M80 in January, 1781. M80 is one of the few globular clusters to have had a nova, seen in May, 1860.
HOW TO FIND IT:
Sweep from Sigma toward Beta. M80 is a bright globular cluster about half way between these two stars.
WHAT TO LOOK FOR:
M80 appears round, with a bright center.
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