Explanation: How far can you see?The most distant object easily visible to the unaided eye is M31, the great Andromeda Galaxy some two million light-years away.

 
  • 说明: 人类肉眼轻易就可以看见的最遥远天体是M31,又称为仙女座大星系,离我们约有二百五十万光年远。
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