Messier 30 formed 13 billion years ago and was discovered in 1764 by Charles Messier. Located about 28000 light-years away from Earth, this globular cluster — a dense swarm of several hundred thousand stars — is about 90 light-years across.What does M30 stand for?
Messier 30 (also known as M30 or NGC 7099) is a globular cluster of stars in the southern constellation of Capricornus.Where is M30 located in the sky?
M30 was discovered by Charles Messier in 1764. It is located roughly 28,000 light-years from Earth in the constellation Capricornus. It has an apparent magnitude of 7.7 and can be seen through a pair of binoculars. M30 is best observed during September. For more information about Hubble’s observations of M30, see:Is M30 a star cluster?
Perhaps the first clue to M30’s underlying potential came from Sir William Herschel, who often studied Messier’s objects, but did not report his findings formally. In his personal notes he wrote: “A brilliant cluster, the stars of which are gradually more compressed in the middle.