Because it was moving,..Because it was moving,astronomers ruled it was a moon and not a background star,which is not moving.

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Becauseitwasmoving,..Becauseitwasmoving,astronomersruleditwasamoonandnotabackgroundstar,whichisnotmo

Because it was moving,..Because it was moving,astronomers ruled it was a moon and not a background star,which is not moving.
Because it was moving,..
Because it was moving,astronomers ruled it was a moon and not a background star,which is not moving.

Because it was moving,..Because it was moving,astronomers ruled it was a moon and not a background star,which is not moving.
由于它在运动,天文学家把它定义成了一颗卫星,而不是不动的星星.