Messier 54 facts for kids
M54 is some 87,000 light-years from us, and has a radius of 150 light-years across. It is one of the most dense globulars. It shines with the luminosity of roughly 850,000 times that of the Sun and has an absolute magnitude of −10.0.
It is on or near SagDEG's center. Some authors think it actually may be its core; but others do not.
In July 2009, a team of astronomers found evidence of a medium-sized black hole in the core of M54.
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Messier 54 Facts for Kids. Kiddle Encyclopedia.