科学家们在前往另一颗行星的任务中发现的第一件事就是，金星根本不是小说中描绘的人间天堂。

The very first thing that scientists discovered with a mission to another planet was that Venus was not at all the earthly paradise that fiction had portrayed.

youdao

NASA的确有行星的保护计划。例如宇宙飞船是消毒过的，有时候在任务完成后会被销毁。

NASA does have a planetary protection program where spacecraft are sterilized and sometimes destroyed at end-of-mission.

youdao

在2年的任务执行中，美国宇航局的行星搜索太空望远镜“开普勒”获得了巨大的成功。

TWO years into its mission, NASA's planet-hunting Kepler space telescope has been a big success.

youdao