Messier 70


Messier 70 (aka M70 or NGC 6681) is a globular cluster of stars in the southern constellation of Sagittarius. It’s about 29,400 light-years away from Earth and roughly 6,500 light-years from the Galactic Center. M70 has undergone core collapse, so it has a very small core radius of 0.22 light-years.

Image Credit: NASA / ESA

Messier 62


Messier 62 is located relatively close to the galactic center, so tidal forces likely are responsible for its being one of the most irregularly shaped globular clusters. The core of M62 (toward the upper right in this Hubble image) contains around 150,000 stars and its very own stellar mass black hole.

Image Credit: NASA / ESA

Messier 13


Messier 13 is a large globular star cluster about 25,000 light years from Earth. It contains several hundred thousand stars and is about 145 light-years in diameter. July is a good month to look for it with a pair of binoculars. About a-third of the way from Vega to Arcturus, four bright stars in the constellation of Hercules form the Keystone asterism. M13 can be seen partway between Zeta Herculis and Eta Herculis, the two star that form the shoulders of the constellation.

Image Credit: NASA / ESA

Messier 56


Messier 56 (or M56) is a globular cluster in the constellation Lyra. It appears to be a slightly fuzzy star in large binoculars or a small telescope, but the cluster can be resolved using a telescope with an aperture of 20 cm or larger.

M56 is at a distance of about 32,900 light-years from Earth and measures around 84 light-years across, with a combined mass some 230,000[4] times that of the Sun. Because the cluster appears to be 13.7 billion years and is following a retrograde orbit through the Milky Way, it is believed to be part of the Gaia Sausage, the remains of a dwarf galaxy that merged with the Milky Way.

Image Credit: NASA / ESA