The relationship showing that more massive main sequence stars are significantly more luminous, approximately following L ∝ M³·⁵. This fundamental relationship helps astronomers determine stellar masses from brightness measurements.
Compound of 'mass' (from Latin 'massa', lump or bulk) + 'luminosity' (from Latin 'lumen', light). The relationship was first established in the early 20th century through observations of binary star systems.
The mass-luminosity relation reveals why massive stars live fast and die young - a star just twice the Sun's mass shines about 11 times brighter, burning through its fuel much faster! This relationship is so fundamental that it's like the cosmic speed limit for how bright a star can be based on its weight.
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