the 30-year-old black hole, known as supernova 1979c (sn 1979c), is about 51 million light years from earth and occurred in galaxy m-100.
据了解,该黑洞年仅30岁,系距离地球约5100万光年的m100星系中的超新星「sn1979c」的余烬。
the record-breaking star is 63 million light years from earth and orbits a dense, collapsed 「white dwarf」 star.
这颗破纪录的恒星距离地球6300万光年,围绕着一颗高密度的白矮星运动。
the andromeda galaxy m31, which is about . 5 million light years from earth in the constellation andromeda.
仙座星云m31,间隔地球大约两百五十万光年。当然它位于仙座。