The Unified Astronomy Thesaurus

Search Results

Schonberg-Chandrasekhar limit original
dcterms created equal to or less than 2018-09-10T16:07:43Zequal to or more than 2018-09-10T16:07:43Z
dcterms modified equal to or less than 2018-09-11T18:40:36Zequal to or more than 2018-09-11T18:40:36Z
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Gravitational collapse original
definition This represents the maximum fraction of a star's mass that can be contained within an isothermal core while still supporting the rest of the star in hydrostatic equilibrium. Once the mass of an isothermal helium core exceeds this limit, the corse collapses and the star evolve rapidly. The limit varies depending on the star.
Comas original
dcterms modified equal to or less than 2018-09-07T15:36:55Zequal to or more than 2018-09-07T15:36:55Z
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Comets original
definition The nebulous envelope around the nucleus of a comet, formed when the comet passes close to the Sun.
Chandrasekhar limit original
dcterms modified equal to or less than 2018-09-10T16:13:57Zequal to or more than 2018-09-10T16:13:57Z
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Gravitational collapse original
definition The maximum mass limit for a white dwarf star, ~1.44 solar masses. White dwarf stars in a binary system accreting mass from a companion will collapse in a Type II supernova once this limit is exceeded.
L galaxies original
dcterms modified equal to or less than 2016-11-01T17:59:43Zequal to or more than 2016-11-01T17:59:43Z
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Low surface brightness galaxies original
definition In Morgan's classification, an elongated galaxy of low surface brightness. --Glossary of Astronomy and Astrophysics, J. Hopkins, University of Chicago Press (1976)
DQ Herculis stars original
dcterms modified equal to or less than 2018-09-13T20:20:25Zequal to or more than 2018-09-13T20:20:25Z
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Novae original
definition "A type of cataclysmic variable binary star system with a white dwarf and a cool main-sequence secondary star." - Wikipedia
Field stars original
dcterms created equal to or less than 2018-09-14T19:11:19Zequal to or more than 2018-09-14T19:11:19Z
dcterms modified equal to or less than 2018-09-14T19:14:04Zequal to or more than 2018-09-14T19:14:04Z
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Stellar types original
definition "A star that does not belong to a stellar cluster, but happens to be adjacent to it." - An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri.
Field galaxies original
dcterms modified remove maximum value filterequal to or more than 2018-09-14T19:14:18Z
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Galaxies original
definition "A galaxy that lies in the direction of a cluster of galaxies, but is not a member of the cluster. Field galaxies are rare, less than about 5% of all galaxies." - An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri.
Stellar granulation original
dcterms created equal to or less than 2018-09-14T16:58:41Zequal to or more than 2018-09-14T16:58:41Z
dcterms modified equal to or less than 2018-09-14T16:58:50Zequal to or more than 2018-09-14T16:58:50Z
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Stellar physics original
Asymptotic giant branch stars original
dcterms created equal to or less than 2018-09-13T21:08:20Zequal to or more than 2018-09-13T21:08:20Z
dcterms modified equal to or less than 2018-09-13T21:08:35Zequal to or more than 2018-09-13T21:08:35Z
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Stellar evolutionary types original
Stellar spectral types original
dcterms created equal to or less than 2018-09-13T17:13:21Zequal to or more than 2018-09-13T17:13:21Z
dcterms modified equal to or less than 2018-09-13T17:16:52Zequal to or more than 2018-09-13T17:16:52Z
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Stellar types original
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A stars original
B stars original
F stars original
G stars original
K stars original
M stars original
O stars original
OB stars original
R stars original
S stars original