stellar brightness

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• Timeline of stellar astronomy — Timeline of stellar astronomy* 134 BC Hipparchus creates the magnitude scale of stellar apparent luminosities * 185 AD Chinese astronomers become the first to observe a supernova, the SN 185 * 964 Abd al Rahman al Sufi (Azophi) writes the Book of …   Wikipedia

• Low surface brightness galaxy — A low surface brightness galaxy or LSB galaxy is a diffuse galaxy with a surface brightness that, when viewed from Earth, is at least one magnitude lower than the ambient night sky.Most LSBs are dwarf galaxies, in which most of their baryonic… …   Wikipedia

• Surface brightness fluctuation — (SBF) is a secondary distance indicator used to estimate distances to galaxies. The technique uses the fact that galaxies are made up of a finite number of stars. The number of stars in any small patch of the galaxy will vary from point to point …   Wikipedia

• Virgo Stellar Stream — Infobox Galaxy name = Virgo Stellar Stream epoch = J2000 type = remains of a dSph ra = ? dec = ? dist ly = 30 kly appmag v = ? size v = 30 prime; times; 10 prime; constellation name = Virgo radius ly = ? absmag v = ? names = noneThe Virgo Stellar …   Wikipedia

• astronomy — /euh stron euh mee/, n. the science that deals with the material universe beyond the earth s atmosphere. [1175 1225; ME astronomie ( < AF) < L astronomia < Gk. See ASTRO , NOMY] * * * I Science dealing with the origin, evolution, composition,… …   Universalium

• Bayer designation — A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation s Latin name. The original list of Bayer designations contained 1,564 stars.Most of… …   Wikipedia

• Shapley , Harlow — (1885–1972) American astronomer Shapley came from a farming background in Nashville, Missouri. He began his career as a crime reporter on the Daily Sun of a small Kansas town when he was 16. He entered the University of Missouri in 1907 intending …   Scientists

• star — 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,… …   Universalium

• cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium

• galaxy — /gal euhk see/, n., pl. galaxies. 1. Astron. a. a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. b. (usually cap.) See Milky Way. 2. any large and brilliant or impressive… …   Universalium

• Star — For other uses, see Star (disambiguation) …   Wikipedia