M107
Magnitude 7.9 globular cluster located 20,900 light-years away in the constellation Ophiuchus. It was discovered by Pierre Méchain in April 1782, then independently by William Herschel in 1793.
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#astrophotography #astronomy #space #unistellar #citizenscience #m107 #cluster #ophiuchus #messier #messiermarathon