<http://dbpedia.org/resource/Stellar_age_estimation>	<http://www.w3.org/2000/01/rdf-schema#comment>	"Various methods and tools are involved in stellar age estimation, an attempt to identify within reasonable degrees of confidence what the age of a star is. These methods include stellar evolutionary models, membership in a given star cluster or system, fitting the star with the standard spectral and luminosity classification system, and the presence of a protoplanetary disk, among others."@en .
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<http://dbpedia.org/resource/Stellar_age_estimation>	<http://www.w3.org/2000/01/rdf-schema#seeAlso>	<http://dbpedia.org/resource/Protoplanetary_disk> .
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