spectrum variable stars

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• Variable star — A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star s actual luminosity, or to variations in the amount of the star s light that is blocked from… …   Wikipedia

• variable star — Astron. a star that varies markedly in brightness from time to time. Also called variable. [1780 90] * * * Star whose observed brightness varies noticeably in intensity. Pulsating variables expand and contract in cycles, pulsating rhythmically in …   Universalium

• Stars and planetary systems in fiction — The planetary systems of stars other than the Sun and the Solar System are a staple element in much science fiction. Contents 1 Overview 1.1 The brightest stars …   Wikipedia

• Variable speed of light — The variable speed of light (VSL) concept states that the speed of light in a vacuum, usually denoted by c , may not be constant in some cases. In most situations in condensed matter physics when light is traveling through a medium, it… …   Wikipedia

• List of most luminous stars — Below is a list of stars arranged in order of decreasing luminosity (increasing bolometric magnitude). Accurate measurement of stellar luminosities is quite difficult in practice, even when the apparent magnitude is measured accurately, for three …   Wikipedia

• Algol variable — Algol variables or Algol type binaries are a class of eclipsing binary stars. When the cooler component passes in front of the hotter one, part of the latter s light is blocked, and the total brightness of the binary, as viewed from Earth,… …   Wikipedia

• Microvariability and Oscillations of STars telescope — MOST General information NSSDC ID 2003 031D Organization The Canadian Space Agency (CSA) Launch date June 30, 2003 14:15 UTC Launched from …   Wikipedia

• Symbiotic variable star — A Symbiotic Variable star is a variable binary star system in which one star has expanded its outer envelope and is shedding mass quickly, and another hot star (often a white dwarf) is ionizing the gas [… …   Wikipedia

• Differential rotation in stars — What is differential rotation? *Differential rotation is when a rotating body has different angular velocities at different latitudes and/or depths of the body and/or in time. Differential rotation can be applied to any type of fluid body such as …   Wikipedia

• Cor Caroli — ▪ star also called  Alpha Canum Venaticorum,         binary star located 110 light years from Earth in the constellation Canes Venatici and consisting of a brighter component (A) of visual magnitude 2.9 and a companion (B) of magnitude 5.5. It is …   Universalium

• 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