Celestial hemisphere:  Northern  ·  Constellation: Leo (Leo)
Leo II Dwarf galaxy - PGC34176, Jan Sjoerd de Vries
Leo II Dwarf galaxy - PGC34176
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Leo II Dwarf galaxy - PGC34176

Leo II Dwarf galaxy - PGC34176, Jan Sjoerd de Vries
Leo II Dwarf galaxy - PGC34176
Powered byPixInsight

Leo II Dwarf galaxy - PGC34176

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Description

Leo II (or Leo B: https://en.wikipedia.org/wiki/Leo_II_(dwarf_galaxy)) is a dwarf spheroidal galaxy about 690,000 light-years (or ~210 kpc) away in the constellation Leo. It is one of 24 known satellite galaxies of the Milky Way. Leo II is thought to have a core radius of 178 ± 13 pc and a tidal radius of 632 ± 32 pc. It was discovered in 1950 by Robert George Harrington and Albert George Wilson, from the Mount Wilson and Palomar Observatories in California. Leo II consists largely of metal-poor older stars, a sign that it has survived the galactic cannibalism under which massive galaxies (e.g., the Milky Way) consume smaller galaxies to attain their extensive size. Its mass is estimated to be (2.7 ± 0.5)×107 M⊙

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Leo II Dwarf galaxy - PGC34176, Jan Sjoerd de Vries