MESSENGER is now in the last stages of multiple gravity-assist flybys of Earth, Venus and Mercury, en route to an insertion into orbit around Mercury in March of 2011.
NASA's Mercury probe Messengerlast Thursday became the first spacecraft to go into orbit around Mercury.
上周，美国宇航局的信使号水星探测器成为历史上第一个进入水星轨道的飞行器。
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When the robotic MESSENGER spacecraft glided by the planet Mercury last month, it was able to image portions of the Sun's closest planet that had never been seen before.