|
ESO 306-17 is a fossil group giant elliptical galaxy in the Columba constellation, about 1 million light-years in diameter, and 493 million light-years away.〔MSNBC, ("A Giant Among Galaxies ?" ), Alan Boyle, ''4 March 2010'' (accessed 5 March 2010)〕 The galaxy is situated alone in a volume of space about it. It is theorized that the galaxy cannibalized its nearest companions, hence, being a fossil group.〔Astronomy Now, ("Bully galaxy rules the neighbourhood" ), Emily Baldwin, ''4 March 2010'' (accessed 5 March 2010)〕 The galaxy is a giant elliptical of type cD3 (E+3), one of the largest classes of galaxies. == References == * Discovery News, ("Bully for ESO 306-17" ), Jennifer Ouellette, ''3 March 2010'' (accessed 5 March 2010) * EurekAlert, ("ACS Image of ESO 306-17" ), Colleen Sharkey, ''4 March 2010'' (accessed 5 March 2010) * NASA Extragalactic Database, (''object ESO 306-???017'' ) (accessed 5 March 2010) * SIMBAD, ("ESO 306-17 -- Galaxy" ) (accessed 5 March 2010) 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「ESO 306-17」の詳細全文を読む スポンサード リンク
|