The gravitational acceleration experienced at a star's visible surface, determined by the star's mass and radius. Surface gravity affects stellar atmospheres, spectral line shapes, and the ability of stars to retain material.
Combines 'surface' from Latin 'superficies' and 'gravity' from Latin 'gravitas' meaning weight or heaviness. The stellar application developed in the 20th century as astronomers began understanding how gravity shapes stellar structure and spectra.
Surface gravity creates the cosmic equivalent of different worlds on each star! On a white dwarf, you'd weigh 100,000 times more than on Earth, while on a red supergiant, you'd float like a feather in an ocean of stellar gas.
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