Gliese 581是一颗已经接近生命终点的红巨星，星光十分暗淡，在没有天文望远镜的情况下，从夜空中根本无法看到。

Its star is a red giant - a massive star near the end of its life. It is too dim to see in the night sky from Earth without a telescope.

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Gliese 581是一颗已经接近生命终点的红巨星，星光十分暗淡，在没有天文望远镜的情况下，从夜空中根本无法看到。

Its star is a red giant - a massive star near the end of its life. It is too dim to see in the night sky from Earth without a telescope.

youdao