It's rare because the moon is usually either above or below the plane of Earth's orbit.

这种天文景观很少发生因为月亮很少处于地球的平面轨道上.

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The Hubble Space Telescope combines astronomy with rocket science and operates in Earth's orbit.

哈勃太空望远镜将火箭技术与天文学结合,工作在地球轨道上.

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This means wavelengths up to ten times the diameter of the Earth's orbit.

也就是说对应的波长将达到地球绕日轨道直径的十倍.

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But it's scaled down. This entire solar system would fit within Earth's orbit.

但如果让这个星系按比例缩小, 那么这整个星系就可以被容纳进地球旋转的轨道中.

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