hypergiant stars

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• Hypergiant — A hypergiant (luminosity class 0) is a star with a tremendous mass and luminosity, showing signs of a very high rate of mass loss. CharacteristicsThe word “hypergiant” is commonly used as a loose term for the most massive stars found, even though …   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

• List of most massive stars — This is a list of the most massive stars so far discovered. The list is ordered by solar mass (1 solar mass = the mass of Earth s Sun). Stellar mass is the most important attribute of a star. Combined with chemical compositions, mass determines a …   Wikipedia

• Yellow hypergiant — Generally speaking, a yellow hypergiant is a very massive star with an extended atmosphere, which can be classified as spectral class from late A to K, with a mass of as much as 20 50 solar masses . Yellow hypergiants, such as Rho Cassiopeiae in… …   Wikipedia

• List of nearest stars — Artist s conception of a red dwarf star, the most common type of star in the Sun s stellar neighborhood, and in the universe. Although termed a red dwarf, the surface temperature of this star would give it an orange hue when viewed from close… …   Wikipedia

• List of proper names of stars — This is a list of proper names for stars, mostly derived from Arabic and Latin. See also the list of stars by constellation, which gives variant names, derivations, and magnitudes. Of the roughly 10,000 stars visible to the naked eye, only few… …   Wikipedia

• Hypernova — For the rock band, see Hypernova (band). Eta Carinae, in the constellation of Carina, one of the nearer candidates for a future hypernova Hypernova (pl. hypernovae), also known as a type 1c Supernova, refers to an incredibly large star that… …   Wikipedia

• Cygnus OB2-12 — as seen by a hypothetical close orbiting planet. Observation data Epoch J2000      Equinox J2000 …   Wikipedia

• Astronomical object — Celestial object and Celestial body redirect here. For other uses, see Celestial (disambiguation). This article is about naturally occurring objects. For artificial objects, see Satellite. Astronomical objects or celestial objects are naturally… …   Wikipedia

• gamma-ray burster — ▪ astronomy       any of a class of very distant objects responsible for intense, nonrepeating flashes of high energy gamma rays that appear unpredictably at arbitrary points in the sky at a rate of about one per day and typically last only… …   Universalium

• Stellar classification — In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are… …   Wikipedia