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- Leo_A abstract "Leo A ( also known as Leo III ) is an irregular galaxy that is part of the Local Group. It lies 2.6 million light-years from Earth. This galaxy was discovered by Fritz Zwicky in 1942. The estimated mass of this galaxy is (8.0 ± 2.7) × 107 solar masses, with at least 80% consisting of an unknown dark matter. It is one of the most isolated galaxies in the local group and shows no indications of an interaction or merger for several billion years. However, Leo A is nearly unique among irregular galaxies in that more than 90% of its stars formed more recently than 8 billion years ago, suggesting a rather unusual evolutionary history. The presence of RR Lyrae variables shows that the galaxy has an old stellar population that is up to 10 billion years in age.The neutral hydrogen in this galaxy occupies in a volume similar to its optical extent, and is distributed in a squashed, uneven ring. The galaxy is not rotating and the hydrogen is moving about in random clumps. The proportion of elements with higher atomic numbers than helium is only about 1-2% of the ratio in the Sun. This indicates a much less complete conversion of gas into stars than in the Milky Way galaxy. The Leo A galaxy shows sign of increased star formation some time within the last 1-4 billion years, although the current level is low. There are four H II regions powered by short-lived, O-class stars.".
- Leo_A thumbnail Leo_A_Hubble_WikiSky.jpg?width=300.
- Leo_A wikiPageID "1861998".
- Leo_A wikiPageLength "4831".
- Leo_A wikiPageOutDegree "30".
- Leo_A wikiPageRevisionID "673259361".
- Leo_A wikiPageWikiLink 10_zettametres.
- Leo_A wikiPageWikiLink 1_E22_m.
- Leo_A wikiPageWikiLink Atomic_number.
- Leo_A wikiPageWikiLink Category:Dwarf_galaxies.
- Leo_A wikiPageWikiLink Category:Irregular_galaxies.
- Leo_A wikiPageWikiLink Category:Leo_(constellation).
- Leo_A wikiPageWikiLink Category:Local_Group.
- Leo_A wikiPageWikiLink Category:PGC_objects.
- Leo_A wikiPageWikiLink Category:UGC_objects.
- Leo_A wikiPageWikiLink Dark_matter.
- Leo_A wikiPageWikiLink David_Dunlap_Observatory_Catalogue.
- Leo_A wikiPageWikiLink Earth.
- Leo_A wikiPageWikiLink Epoch_(astronomy).
- Leo_A wikiPageWikiLink Fritz_Zwicky.
- Leo_A wikiPageWikiLink Galaxy.
- Leo_A wikiPageWikiLink H_II_region.
- Leo_A wikiPageWikiLink Hubble_Space_Telescope.
- Leo_A wikiPageWikiLink Irregular_galaxy.
- Leo_A wikiPageWikiLink J2000.
- Leo_A wikiPageWikiLink Leo_(constellation).
- Leo_A wikiPageWikiLink Light-year.
- Leo_A wikiPageWikiLink Local_Group.
- Leo_A wikiPageWikiLink Milky_Way.
- Leo_A wikiPageWikiLink O-type_main-sequence_star.
- Leo_A wikiPageWikiLink O-type_main_sequence_star.
- Leo_A wikiPageWikiLink Parsec.
- Leo_A wikiPageWikiLink Principal_Galaxies_Catalogue.
- Leo_A wikiPageWikiLink RR_Lyrae_variable.
- Leo_A wikiPageWikiLink Solar_mass.
- Leo_A wikiPageWikiLink Uppsala_General_Catalogue.
- Leo_A wikiPageWikiLink File:Leo_A_Hubble_WikiSky.jpg.
- Leo_A wikiPageWikiLinkText "Leo A".
- Leo_A appmagV "12.9".
- Leo_A caption "Leo A by Hubble Space Telescope".
- Leo_A constellationName Leo_(constellation).
- Leo_A distLy "2.6".
- Leo_A epoch Epoch_(astronomy).
- Leo_A epoch J2000.
- Leo_A hasPhotoCollection Leo_A.
- Leo_A name "Leo A".
- Leo_A names "Leo III, UGC 5364, DDO 69, PGC 28868".
- Leo_A sizeV "5".
- Leo_A type "IBm".
- Leo_A wikiPageUsesTemplate Template:Infobox_Galaxy.
- Leo_A wikiPageUsesTemplate Template:Reflist.
- Leo_A wikiPageUsesTemplate Template:Sky.
- Leo_A wikiPageUsesTemplate Template:WikiSky.
- Leo_A z "6.7E-5".
- Leo_A subject Category:Dwarf_galaxies.
- Leo_A subject Category:Irregular_galaxies.
- Leo_A subject Category:Leo_(constellation).
- Leo_A subject Category:Local_Group.
- Leo_A subject Category:PGC_objects.
- Leo_A subject Category:UGC_objects.
- Leo_A hypernym Galaxy.
- Leo_A type CelestialBody.
- Leo_A type Galaxy.
- Leo_A type Place.
- Leo_A type Catalogue.
- Leo_A type Object.
- Leo_A type Location.
- Leo_A type Place.
- Leo_A type Thing.
- Leo_A type Q318.
- Leo_A comment "Leo A ( also known as Leo III ) is an irregular galaxy that is part of the Local Group. It lies 2.6 million light-years from Earth. This galaxy was discovered by Fritz Zwicky in 1942. The estimated mass of this galaxy is (8.0 ± 2.7) × 107 solar masses, with at least 80% consisting of an unknown dark matter. It is one of the most isolated galaxies in the local group and shows no indications of an interaction or merger for several billion years.".
- Leo_A label "Leo A".
- Leo_A sameAs Leo_A.
- Leo_A sameAs Leo_A.
- Leo_A sameAs Leo_A.
- Leo_A sameAs Leo_A.
- Leo_A sameAs しし座A.
- Leo_A sameAs Leo_A.
- Leo_A sameAs Leo_A.
- Leo_A sameAs m.061xg_.
- Leo_A sameAs Лев_A.
- Leo_A sameAs Q587930.
- Leo_A sameAs Q587930.
- Leo_A sameAs 獅子座A.
- Leo_A wasDerivedFrom Leo_A?oldid=673259361.
- Leo_A depiction Leo_A_Hubble_WikiSky.jpg.
- Leo_A isPrimaryTopicOf Leo_A.
- Leo_A name "Leo A".
- Leo_A name "Leo III,UGC5364,DDO69,PGC28868".