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Holmberg II
Holmberg II is a dwarf galaxy in constellation Ursa Major. Its apparent magnitude is 11,1m and it's 11 millions light years away from Earth. The galaxy is dominated by huge glowing gas bubbles, which are region of star formation.〔(【引用サイトリンク】url=http://www.spacetelescope.org/news/heic1114/ )〕 Holmberg II also hosts an ultraluminous X-ray source. One hypothesis suggests that is caused by an intermediate mass black hole, that is pulling surrounding material.〔 It was discovered by Erik Bertil Holmberg. == References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Holmberg II」の詳細全文を読む
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