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Welcome to the Voice of America's News Words.
欢迎收看美国之音：新闻词汇。
NASA's TESS satellite launched in April.
美国宇航局的TESS卫星于今年4月发射。
Its mission is to look for planets orbiting nearby stars. Exoplanet.
该行星的任务是寻找围绕附近恒星运行的行星。太阳系外行星。
TESS searches for exoplanets in one piece of the sky before going on to another.
TESS卫星先在一片天空中寻找系外行星，然后再前往另一片天空。
When the satellite completes its search, scientists will perform a detailed study of the exoplanets.
当卫星完成搜索后，科学家们将对系外行星进行详细的研究。
Exoplanets are planets that orbit a star other than the sun.
太阳系外行星是围绕太阳以外的恒星运行的行星。
Since 1995, thousands of exoplanets have been discovered.
自1995年以来，人们已经发现了数千颗系外行星。
Little is known about them, including whether some might hold forms of life.
人们对它们知之甚少，包括一些行星是否可能拥有生命形式。
