Limb darkening
Limb darkening is an optical effect seen in stars (including the Sun) and planets, where the central part of the disk appears brighter than the edge, or limb.1 Its understanding offered early solar astronomers an opportunity to construct models with such gradients. This encouraged the development of the theory of radiative transfer.
Printed 2026-07-13.
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Footnotes
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Roun, Daniel (2003). “Limb Darkening”. In Gargaud, Muriel; Amils, Ricardo; Quintanilla, José Cernicharo; Cleaves, Henderson James; Irvine, William M.; Pinti, Daniele L.; Viso, Michel (eds.). Encyclopedia of Astrobiology. Berlin, Heidelberg: Springer. pp. 925–926. doi:10.1007/978-3-642-11274-4_885. ISBN 978-3-642-11271-3. ↩