Solar luminosityBasic property used to characterize stars, luminosity is defined as the total energy radiated by a star each second. An object’s luminosity is often compared to that of the Sun (Lsun = 4 × 1033 ergs/s = 3.9 × 10 Watts). Luminosity has the same units as power (energy per is 4 × 1033 ergs per second.
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