It landed on the near side of the moon.

它在月球近侧着陆。

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For decades scientists have been trying to understand why the visible near side of the Moon is covered in craters while the far side has mountain ranges higher than 3, 000 metres.

数十年来科学家们一直试图想搞清为何月球正面布满环形山而背面的山高过3千米。

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Although it is often regarded as the dark side of the moon, the far side actually gets as much sunshine as the near side.

虽然月球背面经常被认为是月球暗面，但事实上月球背面的阳光照射同月球正面一样多。

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And it could shed light on remaining mysteries, such as why the crust on the far side of the Moon is thicker than that on the near side.

BBC: Nasa reveals new information about moon probes crash sites

But the size of the Earth is a few percent of the distance to the moon, which translates to about a 7% stronger gravitational pull on the near side of the Earth than the far side.

CNN: The sun, the moon and the Titanic

One theory for the difference between the Moon's far side and near side is an ancient collision with a second natural satellite of Earth.

BBC: Nasa reveals new information about moon probes crash sites