carbon stars

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• General Catalog of Galactic Carbon Stars — El General Catalog of Galactic Carbon Stars, también conocido como Cool Galactic Carbon Stars, es un catálogo estelar que recoge 5987 estrellas de carbono frías cuyas posiciones tienen al menos una precisión equivalente a la del Catálogo de Henry …   Wikipedia Español

• Carbon star — A carbon star is a late type star similar to a red giant (or occasionally to a red dwarf) whose atmosphere contains more carbon than oxygen; the two elements combine in the upper layers of the star, forming carbon monoxide, which consumes all the …   Wikipedia

• carbon cycle — n. 1. the cycle by which plants through photosynthesis use atmospheric carbon dioxide to produce carbohydrates, which are in turn metabolized by animals to decomposition products that return carbon dioxide to the atmosphere 2. a cyclic series of… …   English World dictionary

• Carbon planet — Artist s concept of a carbon planet. The surface is dark and reddish from hydrocarbon deposits. A carbon planet, also referred to as a diamond planet or carbide planet,[1] is a theoretical type of planet proposed by Marc Kuchner that could form… …   Wikipedia

• carbon cycle — 1. Ecol. the circulation of carbon atoms in the biosphere as a result of photosynthetic conversion of carbon dioxide into complex organic compounds by plants, which are consumed by other organisms: the carbon returns to the atmosphere in the form …   Universalium

• Carbon burning process — The carbon burning process is a set of nuclear fusion reactions that take place in massive stars (at least 4 MSun at birth) that have used up the lighter elements in their cores. It requires high temperatures (6 times;108 K) and densities (about… …   Wikipedia

• Carbon-12 — Infobox isotope alternate names =carbon 12 isotope symbol =C mass number =12 mass =12 num neutrons =6 num protons =6 abundance =98.89% halflife = error halflife = background =#f99 text color = decay product = decay symbol = decay mass = decay… …   Wikipedia

• Carbon Nanotube — Schematische animierte Darstellung der Struktur einer Kohlenstoffnanoröhre Kohlenstoffnanoröhren, auch CNT (englisch carbon nanotubes), sind mikroskopisch kleine röhrenförmige Gebilde (molekulare Nanoröhren) aus Kohlenstoff. Ihre Wände bestehen… …   Deutsch Wikipedia

• carbon cycle — /ˈkabən saɪkəl/ (say kahbuhn suykuhl) noun 1. Biology the circulation on earth of carbon atoms, from the atmosphere through plants and animals back into the atmosphere. 2. Astrophysics a cycle of nuclear transformations, with the release of… …  

• carbon cycle — noun 1. the organic circulation of carbon from the atmosphere into organisms and back again • Hypernyms: ↑organic process, ↑biological process 2. a thermonuclear reaction in the interior of stars • Hypernyms: ↑thermonuclear reaction * * * ˈcarbon …   Useful english dictionary

• Carbon Glacier (album) — Infobox Album | Name = Carbon Glacier Type = Album Artist = Laura Veirs Released = 2004 Recorded = ??? Genre = Folk Length = 39:20 Label = Nonesuch Records (US), Bella Union (UK) Producer = Tucker Martine Reviews = *Allmusic Rating|4|5… …   Wikipedia