@prefix rdf: . @prefix xsd: . @prefix dcterms: . @prefix skos: . @prefix rdfs: . @prefix api: . @prefix foaf: . skos:broader . skos:broader . skos:broader . skos:narrower . skos:related . skos:broader . skos:broader . a rdfs:Resource , skos:Concept ; dcterms:contributor ; dcterms:modified "2020-10-30T19:55:49.273Z"^^xsd:dateTime ; skos:altLabel "Class G stars"@en , "G-type stars"@en ; skos:broader , ; skos:definition "A member of a class of stars to which the Sun belongs. The G-type stars on the main sequence have surface temperatures of 5,300-6,000 K and therefore appear yellow in color. G type giant stars (such as Capella) are almost 100-500 K colder than the corresponding main sequence stars. G type supergiants have temperatures of 4,500-5,500 K. The spectrum of early type G stars, such as the Sun (G2), is dominated by ionized lines of calcium (H and K lines, mainly) and neutral metals. In later type G stars the molecular bands of CH molecules and CN molecules become visible. The main sequence and giant stars have masses of ~ 1 solar mass, while the supergiants are of ~ 10 solar masses. The luminosities of G-type giants are almost 30-60 times greater than that of the Sun, whereas the supergiants are 10,000-30,000 times more luminous."@en ; skos:narrower , , , , ; skos:prefLabel "G stars"@en ; skos:related . skos:narrower . a api:ItemEndpoint , api:Page ; api:definition ; api:extendedMetadataVersion ; foaf:primaryTopic .