chemical composition of stars

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• chemical element — Introduction also called  element,         any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.       This article considers the… …   Universalium

• composition */*/ — UK [ˌkɒmpəˈzɪʃ(ə)n] / US [ˌkɑmpəˈzɪʃ(ə)n] noun Word forms composition : singular composition plural compositions 1) [uncountable] the way that something is formed from separate parts or people Households differ widely in their size and… …   English dictionary

• composition — com|po|si|tion [ ,kampə zıʃn ] noun ** 1. ) uncount the way something is formed from separate parts or people: Households differ widely in their size and composition. the chemical composition of stars 2. ) count something such as a piece of music …   Usage of the words and phrases in modern English

• Chemical element — The periodic table of the chemical elements A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus.[1] Familiar examples of …   Wikipedia

• Abundance of the chemical elements — Estimated proportions of matter, dark matter and dark energy in the universe. Only the fraction of the mass and energy in the universe labeled atoms is composed of chemical elements. The abundance of a chemical element measures how relatively… …   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

• Pyrotechnic composition — A pyrotechnic composition is a substance or mixture of substances designed to produce an effect by heat, light, sound, gas or smoke or a combination of these, as a result of non detonative self sustaining exothermic chemical reactions.… …   Wikipedia

• Список награждённых Национальной медалью науки США — Джошуа Ледерберг (справа) получает Национальную медаль науки из рук Президента США Джорджа Буша старшего Список …   Википедия

• Astrophysics — is the branch of astronomy that deals with the physics of the universe, including the physical properties (luminosity, density, temperature, and chemical composition) of celestial objects such as stars, galaxies, and the interstellar medium, as… …   Wikipedia

• Über das farbige Licht der Doppelsterne und einiger anderer Gestirne des Himmels — is a treatise by Christian Doppler (1842) [Some sources mention 1843 as year of publication because in that year the article was published in the Proceedings of the Bohemian Society of Sciences. Doppler himself referred to the publication as Prag …   Wikipedia

• Hoyle, Sir Fred — born June 24, 1915, Bingley, Yorkshire, Eng. died Aug. 20, 2001, Bournemouth, Dorset British mathematician and astronomer. He was educated at the University of Cambridge, where he became a lecturer in 1945. Within the framework of Albert Einstein …   Universalium