Wednesday, Nov 5, 2025

Messier 10 (M10) is a globular cluster located in the constellation Ophiuchus, about 14,300 light-years from Earth. It contains hundreds of thousands of ancient stars and spans roughly 80 light-years across. With an apparent magnitude of 6.4, it can be seen with binoculars under dark skies. Its dense, bright core is dominated by orange and yellow stars. The cluster is estimated to be around 11.4 billion years old.