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Boötes Dwarf : ウィキペディア英語版
Boötes I (dwarf galaxy)

The Boötes Dwarf Galaxy (''Boo I dSph'') is a galaxy, which appears faint, with a luminosity of and an absolute magnitude of –5.8. It lies about away in the constellation Boötes. This dwarf spheroidal galaxy appears to be tidally disrupted by the Milky Way Galaxy, which it orbits, and has two stellar tails that cross over to form a cross. Tidally disrupted galaxies usually only form one tail.
Like many of the ultrafaint dwarf spheroidals, the entire galaxy appears fainter than the star Rigel (absolute magnitude –6.8).
== Notes ==


  1. Apparent magnitude = Absolute magnitude + Distance modulus = –5.8〔 + 18.9〔 = 13.1



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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