The robotic spacecraft MESSENGER found out as it looked toward the Earth during its closest approach to the Sun about three months ago.
当太空探测器信使号在三个月前到达离太阳最近的地方并回望地球时，它找到了答案。
Messenger was launched more than six years ago, travelling through the inner solar system and embarking on flybys of Earth, Venus and Mercury.
信使号于六年前发射，穿过太阳系内部，飞越地球、金星和水星。
"Despite its proximity to Earth, the planet Mercury has for decades been comparatively unexplored," said Sean Solomon, Messenger principal investigator.
信使号首席科学家SeanSolomon说：“尽管离地球比较近，但水星在几十年来没有怎么被探索过。”
Messenger and is using gravity from Earth and Venus to slightly alter its orbit over time before it moves into Mercury's orbit in March 2011.
预计信使号飞船将于2011年3月进入水星的运行轨道，在这之前它要借助来自地球和金星的引力，稍微调整一下自己的轨道。
MESSENGER was 28 million miles (46 million kilometers) from the sun and 96 million miles (155 million kilometers) from Earth when it headed into Mercury's orbit, NASA said.
NASA称，当信使号进入水星轨道时，它距离太阳2800万英里(4600万公里)同时距离地球9600英里(15,500万公里)。
It already has many application programming interfaces (APIs) to its Web services, from Virtual Earth to Windows Live Messenger, and continues to release more.
在其网页服务方面，它已经有了很多应用编程接口(APIs)，从VirtualEarth到WindowsLiveMessenger，并且还将会允许更多的接口。
Earth and the Moon from afar - when NASA's MESSENGER spacecraft took this image on May6, 2010, it was 183 million kilometers (114 million miles) away. North is toward the bottom of the image.
这是从遥远处拍摄的地球和月亮形影不离的照片，由美国宇航局信使号飞船于2010年5月6日在1.83亿公里之外拍摄，照片的底部对着正北。
The craft, known as MESSENGER, began the orbit around 9:00 p.m. (0200 GMT) on a mission to circle the planet for one Earth year in an unprecedented study of the tiny, hot planet.
名为“信使”号的该航天器于晚上9点(格林威治标准时间凌晨2点)进入水星轨道，并在此后为期1地球年的时间内，环绕这个细小炎热行星进行史上第一次的研究。
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.
目前“信使号”探测器已经到达了地球、金星、水星多重引力助力飞行的最后一个阶段，并将于2009年9月29号进行第三次飞越最终将在2011年3月正式进入水星轨道。
Flyby: on October 6, 2008, the Messenger probe successfully completed its second flyby of Mercury, sending reams of data back to Earth.
飞掠：2008年10月6日信使号第二次成功飞掠后发回地球的数据。
The messenger of the god, spread his word for non-believers left on earth.
上帝的信使，散布他的言词，使得非信徒离开地球。
The messenger of the god, spread his word for non-believers left on earth.
上帝的信使，散布他的言词，使得非信徒离开地球。
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