The unmanned probe launched March 31, 1966, and entered orbit around the moon two days later.

这艘无人驾驶的航天器发射于1966年3月31日，并在两天后进入绕月轨道运行。

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Jupiter as well as its moons will be visited by at least one unmanned probe from China before 2030, Wu said.

吴艳华称，2030年之前，我国还将向木星及其卫星发射至少一个无人探测器。

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As part of this newly unveiled plan, an unmanned probe will be sent to orbit and land on the Red Planet in 2020.

在新公布的计划中，我国将争取在2020年发射探测和着陆巡视的火星探测器。

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What is certain is that the unmanned probe - which is being closely followed by Voyager II - is still functioning.

BBC: NEWS | Science/Nature | Voyager 'at edge of Solar System'

Personally I think that the bouncing ball approach should be the standard way to land a small unmanned probe on Mars.

BBC: Mars 2 - Earth 0

One way to resolve the issue might be to send an unmanned space probe to Pluto.

ECONOMIST: Pluto out in the cold