(of stellar atmosphere)
51Planetary Nebula M2-9 — For other uses of Butterfly Nebula , see Butterfly Nebula (disambiguation). Minkowski 2 9 (M2 9) Observation data (Epoch J2000) …
52Jiří Grygar — (March 17 1936 in Heinersdorf, Germany, now Dziewietlice, Poland) is a Czech astronomer and popularizer of science. After studying physics at the Masaryk University in Brno and astronomy at the Charles University in Prague he joined the… …
53Kappa Leonis — κ Leonis Données d observation (Époque J2000.0) Ascension droite 09h 24m 39,2591s[1] Déclinaison +26° 10′ 56,367″ …
54Photon diffusion — refers to a situation where photons travel through a material with a high optical depth and very short mean free path. Their behavior is then dominated by scattering and the path of any given photon is effectively a random walk. A large ensemble… …
55Thebe Medupe — Thebe Rodney Medupe (1973) is a South African astrophysicist and founding director of Astronomy Africa. He is perhaps best known for his work on the Cosmic Africa project that attempts to reconcile science and myth. [Reardon, C. African Stars in… …
56Joshua Silver — Professor Joshua D Silver is a UK physicist whose discoveries have included a new way to change the curvature of lenses, with significant application for the low cost manufacture of corrective lens.In 2007 he was leading a group of researchers in …
57Source function — The source function is a characteristic of a stellar atmosphere, and in the case of no scattering of photons, describes the ratio of the emission coefficient to the absorption coefficient. It is a measure of how photons in a light beam are… …
58R Coronae Borealis variable — A R Coronae Borealis variable (abbreviated RCB) is an eruptive variable star that varies in luminosity in two modes, one low amplitude pulsation, and one irregularly occurring sudden fading by 1 to 9 magnitudes. The prototype star R Coronae… …
59Izold Pustylnik — (17 March1938 mdash;2 May2008) was an eminent Ukrainian Estonian astronomer who authored numerous scientific publications and served as editor of the Central European Journal of Physics and vice chairman of the non profit organization Euroscience …
60Гамма Стрельца — γ Стрельца Звезда Наблюдательные данные (Эпоха J2000.0) Тип Одиночная звезда Прямое восхождение …
