International space Station in near Earth orbit, NASA astronauts carried out space walks and lost a bolt and a watcher.

在国际空间站接近地球轨道的地方，NASA的宇航员完成了太空行走，迷失了一个螺钉和一个观测仪。

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The experiment is conducted in co-axial atomic oxygen apparatus under the atomic oxygen flux of near earth orbit environment.

实验中采用同轴源原子氧装置，以近地轨道原子氧通量条件对涂层进行试验。

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For instance, Earth 2 can be seen hanging in the sky near Polaris, the north star, which would put its orbit perpendicular to the solar system's ecliptic-and ripe for discovery long ago.

举例来说，地球2可以在接近北极星的天空中被看到，就是说它的轨道垂直于太阳系黄道，早就准备着被发现了。

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Knowing more about how the Yarkovsky effect changes an asteroid's orbit will help scientists better predict whether RQ36 will come near Earth.

VOA: special.2011.06.22

Scientists have charted about 500 meteors near the Earth's orbit and estimate that 100 of those are potentially dangerous.

CNN: Tunguska

NASA's slice of the pie includes a plan that would improve detection of near-Earth asteroids, send a solar-powered robot ship (like the NASA concept above) to capture one of the space rocks and tow it back to a stable orbit near Earth, where researchers could study it up close.

ENGADGET