Luminosity The luminosity of a star is the amount of light and other forms of radiant energy it radiates per unit of time. It has units of power. The luminosity of a star is determined by its radius and surface temperature. Many stars do not radiate uniformly across their entire surface. The rapidly rotating star Vega, for example, has a higher energy flux (power per unit area) at its poles than along its equator.
Luminosity The luminosity of a star is the amount of light and other forms of radiant energy it radiates per unit of time It has units of power The luminosity of a star is determined by its radius and surface temperature Many stars do not radiate uniformly across their entire surface The rapidly rotating star Vega for example has a higher energy flux (power per unit area) at its poles than along its equator