However, Gliese 581g is twenty light years from the Earth.
然而，Gliese 581g 距离地球20光年。
The new planet, called Gliese 581-g, is different.
这个叫做Gliese 581g的行星很特别。
Whether Gliese 581g is an actual planet remains an open question.
Gliese 581g是否确实是一颗行星依然是个谜。
Gliese 876 is a small, red star with about one-third the mass of the sun.
“格里斯876”是一颗小型红色恒星，其质量约为太阳的三分之一。
Gliese 876 is a small, red star with about one-third the mass of the sun.
“格里斯876”是一颗小型红色恒星，其质量约为太阳的三分之一。
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