luminosity
41self-luminosity — n. * * * …
42Man's luminosity — Видность (восприятие света человеком) …
43mass-luminosity law — ˈ ̷ ̷| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ ̷ ̷ noun : a statement in astronomy: there is a close correlation between the luminosities or absolute magnitudes of stars and their masses so that the more massive stars are in general the more luminous …
44period-luminosity law — noun : a law in astronomy: the period of light variation of a Cepheid variable is in direct relation with its absolute magnitude whereby intrinsically fainter stars have the shorter periods …
45spectrum-luminosity diagram — noun : a graph with the spectral type of each star plotted as the abscissa and the absolute magnitude as the ordinate …
46period-luminosity relation — /pear ee euhd looh meuh nos i tee/, Astron. the relationship between the period of light variation and of the absolute magnitude of Cepheid variable stars. [1945 50] …
47self-luminosity — n …
48triboluminescence — Luminosity produced by friction. [G. tribo, to rub, + luminescence] * * * tri·bo·lu·mi·nes·cence trī bō .lü mə nes ən(t)s, trib ō n luminescence due to friction tri·bo·lu·mi·nes·cent ənt adj * * * tri·bo·lu·mi·nes·cence (tri″bo… …
49Main sequence — A Hertzsprung Russell diagram plots the actual brightness (or absolute magnitude) of a star against its color index (represented as B V). The main sequence is visible as a prominent diagonal band that runs from the upper left to the lower right.… …
50star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …
