A solar mass is the amount of mass in our Sun; it is also the unit in which the masses of other stars, galaxies, and other large celestial bodies are expressed. The solar mass is 1.99 x 10 30. A black hole, for example has anywhere from a million to a billion solar masses.
The solar mass is a standard way to express mass in astronomy, used to describe the masses of other stars and galaxies. It is equal to the mass of the Sun, about two nonillion kilograms or about 332,950 times the mass of the Earth.