网络释义 ... Near-Earth Object Program 太空总署近地球物体计划处 orbit， near-earth 近地轨道 Near-Earth Object Office 体办公室 ...
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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。
If we take the shuttle as an example of a near-Earth orbit, so we have the shuttle.
我们以航天飞机为例，在近地球轨道上，有一个航天飞机。
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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