Most , and possibly all galaxies , including the Milky Way , are believed to contain supermassive black holes at their centers .
A supermassive black hole is a black hole with a mass that is between 105 and 1010 the mass of the sun .
A supermassive black hole is a black hole with a mass that is between 105 and 1010 the mass of the sun .
文章をもっと簡単に書き直してください: Most , and possibly all galaxies , including the Milky Way , are believed to contain supermassive black holes at their centers . 出力: