Ontologies
MDL
Astronomy Thesaurus (MDL)
SKOS
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Last submission date October 17, 2025
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No main scheme defined in the URI property
MDL does not contain collections (skos:Collection)
MDL does not contain collections (skos:Collection)
ID http://data.loterre.fr/ark:/67375/MDL-JDTMJ098-8
http://data.loterre.fr/ark:/67375/MDL-JDTMJ098-8
https://ontoportal-astro.eu/ontologies/MDL/MDL-JDTMJ098-8
Preferred name

O-type star
Synonyms
O star
Definitions
An O star, or O-type star, is a massive, luminous, blue star of spectral type O. O stars have surface temperatures of 30,000°–50,000°C and masses of 20–100 solar masses. Their spectra are dominated by emission lines of singly ionized helium (these lines forming the so-called Pickering series). Most other lines are from at least doubly ionized elements, although H and He I lines are also present. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/O/Ostar.html )
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http://data.loterre.fr/ark:/67375/MDL
Type http://www.w3.org/2004/02/skos/core#Concept

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September 30, 2022
skos:prefLabel
O-type star
skos:definition
An O star, or O-type star, is a massive, luminous, blue star of spectral type O. O stars have surface temperatures of 30,000°–50,000°C and masses of 20–100 solar masses. Their spectra are dominated by emission lines of singly ionized helium (these lines forming the so-called Pickering series). Most other lines are from at least doubly ionized elements, although H and He I lines are also present. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/O/Ostar.html )
skos:altLabel
O star
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