The Cassini mission around Saturn has now been extended to 2017 to better study the complex planetary system as its season changes from equinox to solstice.

卡西尼环绕土星的任务目前已延长至2017年，以在其春秋分到冬夏至的季节变化时更好地研究这个复杂的行星系统。

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

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。

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Atlantis' astronauts will install a new "wide-field planetary camera" during their 11-day maintenance-and-repair mission, the fifth to the telescope.

亚特兰蒂斯号宇航员将在为其11天的维修任务中为哈勃望远镜更换一部新的“广视角行星照相机”，这是对哈勃望远镜的第五次维修。

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Near is the first Nasa planetary mission controlled by a non-Nasa space centre .

BBC: At a glance: Asteroid touchdown

The rocket failures come on top of the loss of Phobos-Grunt, Russia's most ambitious planetary mission in decades.

BBC: Soyuz back in service after failed launch

Rover mission managers named the outcrop as a tribute to Mars scientist Ronald Greeley (1939-2011), who served as a mission team member and taught planetary science at Arizona State University.

MSN: A stunning close-up of Mars taken by visiting NASA rover