For main-sequence stars, this quantity raised to the 3.5th power gives an approximation for the luminosity. The Schwarzschild metric describes spacetime around a spherical body with only this quantity, and the no-hair theorem states that black holes can be characterized by angular momentum, charge, and this quantity. Gravitational anomalies led Fritz Zwicky to postulate dark matter and account for "missing" values of it. The standard unit of this quantity in astronomy is
For main-sequence stars, this quantity raised to the 3.5th power gives an approximation for the luminosity. The Schwarzschild metric describes spacetime around a spherical body with only this quantity, and the no-hair theorem states that black holes can be characterized by angular momentum, charge, and this quantity. Gravitational anomalies led Fritz Zwicky to postulate dark matter and account for "missing" values of it. The standard unit of this quantity in astronomy is the "solar" one, whose value can be used to find the strength of the sun's gravitational field. For 10 points, give this quantity, which equals a star's density times its volume, and is often measured in kilograms.
For main-sequence stars, this quantity raised to the 3.5th power gives an approximation for the luminosity.