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。
The robotic spacecraft MESSENGER found out as it looked toward the Earth during its closest approach to the Sun about three months ago.
奋进号计划在周三返回地球。
亚特兰蒂斯号还会把在轨道上工作了三个月的空间站飞行工程师，妮可尔。P .斯托克(Nicole P .Stott)返回地球。
The Atlantis astronauts also plan to bring a space station flight engineer, Nicole P. Stott back to Earth after three months in orbit.
“神州7号”的三名宇航员今天(星期五)凌晨在抵达距离地球343公里的最终轨道后开始执行任务。
The three-man crew of the Shenzhou (" sacred vessel ") Seven settled into their duties after reaching their final orbit 343 kilometers above the Earth earlier today (Friday).
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。
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.
三个0.94，3.6和13厘米波长（Ka，X和S-波段）的同生无线电信号被从土星环中的卡西尼号飞船送往地球。
Three simultaneous radio signals of 0.94,3.6 and 13 centimeter wavelength (Ka-, X- and S-bands) were sent fromthe Cassini spacecraft through the rings to Earth.
这里显示的勒拿河三角洲，是美国地球资源卫星7号2000年拍摄的假彩色图片，覆盖了拉普捷夫海（Laptev Sea）上超过一万一千平方英里的区域。
The Lena’s delta, shown here in a false-color image taken by the Landsat 7 satellite in 2000, covers more than 11,000 square miles on the Laptev Sea.
钱德拉X射线天文台，排行老三。 1999年7月哥伦比亚号航天飞机搭载升空，运行在高地球轨道上。
The third member of the Great Observatory family, the Chandra X-Ray Observatory (CXO), was deployed from a Space Shuttle and boosted into a high-Earth orbit in July 1999.
情况看起来在起变化，尽管数字地球公司于9月18日发射了它的第二颗卫星——世界视野一号，同时预计将于次年晚些时候发射第三颗卫星。
That looks set to change, though. DigitalGlobe launched its second satellite, WorldView-1, on September 18th, and will launch a third late next year.
2009年七月22号星期三（美国），日全食仅可在横贯地球上方的狭窄区域可见。
On Wednesday, 2009 July 22(U. S. A. ), a total eclipse of the Sun is visible from within a narrow corridor that traverses half of Earth.
奋进号航天飞机在周三晚上安全返回地球，完成了去往国际空间站的一项破纪录的16天太空飞行任务。
The space shuttle Endeavour returned safely to earth on Wednesday evening, completing a record-breaking 16-day mission to the International space Station.
而探月计划的第三阶段，其中包括在返回地球之前的无人采样，将通过发射嫦娥五号来完成。
The third phase, which includes unmanned sampling before returning to Earth, will follow the launch of Chang 'e-5.
加里奥特将于10天后与同行的两位前国际空间站工作人员搭乘“联盟号”飞船的返回舱返回地球。“联盟号”返回舱可搭载三人，曾在前两次飞行中出现故障。
After 10 days in space Garriott will return to Earth with the ISS's former crew aboard a Soyuz re-entry vehicle, a three-person capsule which has malfunctioned on its last two flights.
美国奋进号航天飞机即将返回地球，于周三降落在佛罗里达州，从而结束其长达19年的太空飞行使命。
Space shuttle EndeavourThe US space shuttle Endeavour comes back to Earth on Wednesday for a landing in Florida that will close its 19-year operational career.
其它无人驾驶的星际探险，主要有水手号太空船三次经过最靠近太阳的行星水星，揭示出水星与月球，地球的相同点。
In other interplanetary explorations without astronauts, Mariner 10 spacecraft three times passed by Mercury, the planet closest to the sun, revealing its similarity to both the earth and the moon.
1981年，美国第一艘宇宙飞船哥伦比亚号经过三天试飞后于4月14日返回地球。在试飞期间，哥伦比亚号共绕地球飞行36圈。
April 14th 1981, America's first space shuttle, Columbia, returned to Earth after a three-day test flight. The shuttle orbited the Earth 36 times during the mission.
刚刚结束的嫦娥三号任务标志着中国探月计划第二阶段的完成，这一阶段包括在月球轨道上运行、登陆月球以及返回地球。
The just-concluded Chang 'e-3 mission marked the completion of the second phase of China's lunar program, which included orbiting and landing on the moon and returning to Earth.
刚刚结束的嫦娥三号任务标志着中国探月计划第二阶段的完成，这一阶段包括在月球轨道上运行、登陆月球以及返回地球。 。
Thee just-concluded Chang'e-3 mission marked the completion of the second phase of China's lunar program, which included orbiting and landing on the moon and returning to Earth.
上周三，神州五号宇宙飞船围绕地球飞行了14圈，达到了343公里的高度。
Last Wednesday the Shenzhou 5 spacecraft orbited the Earth 14 times and reached an altitude of 343 kilometres.
上周三，神州五号宇宙飞船围绕地球飞行了14圈，达到了343公里的高度。
Last Wednesday the Shenzhou 5 spacecraft orbited the Earth 14 times and reached an altitude of 343 kilometres.
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