black dwarf stars

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• Black dwarf — A black dwarf is a hypothetical star, created when a white dwarf becomes sufficiently cool to no longer emit significant heat or light. Since the time required for a white dwarf to reach this state is calculated to be longer than the current age… …   Wikipedia

• Dwarf nova — HT Cas seen in outburst (mag 13.4) on 2010 November 2. Li …   Wikipedia

• Black Star — may refer to:In astronomy*Saturn, is referred to as Black Star in ancient Judaeic beliefs *Dark star, a theoretical star that has a surface escape velocity that equals or exceeds the speed of light *Black hole, any region of space time where… …   Wikipedia

• 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

• Dwarf star — The term dwarf star refers to a variety of distinct classes of stars. Dwarf star alone generally refers to any main sequence star, a star of luminosity class V. Red dwarfs are low mass main sequence stars. Yellow dwarfs are main sequence (dwarf)… …   Wikipedia

• black hole — Astron. a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape. * * * Cosmic… …   Universalium

• Black Hole — 1. Also called Black Hole of Calcutta. a small prison cell in Fort William, Calcutta, in which, in 1756, Indians are said to have imprisoned 146 Europeans, only 23 of whom were alive the following morning. 2. (l.c.) any usually wretched place of… …   Universalium

• Black Sun (occult symbol) — The term Black Sun (German Schwarze Sonne ), also referred to as the Sonnenrad (the German for Sun Wheel ), is a symbol of esoteric or occult significance, notable for its usage in Nazi mysticism. Today, it may also be used in occult currents of… …   Wikipedia

• Dwarf elliptical galaxy — Dwarf elliptical galaxies, or dEs, are elliptical galaxies that are much smaller than others. They are classified as dE, and are quite common in galaxy groups and clusters, and are usually companions to other galaxies. Contents 1 Examples 2… …   Wikipedia

• Dwarf galaxy — UGC 9128 is a dwarf irregular galaxy, it probably contains only around one hundred million stars. A dwarf galaxy is a small galaxy composed of up to several billion stars, a small number compared to our own Milky Way s 200 400 billion stars. The… …   Wikipedia

• Black hole — For other uses, see Black hole (disambiguation). Simulated view of a black hole (center) in front of the Large Magellanic Cloud. Note the gravitat …   Wikipedia