The satellite is designed to test the effectiveness of what is called solar sail propulsion.

该卫星的设计目的是测试太阳帆推进技术的有效性。

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Scientists at the Jet Propulsion Laboratory even once investigated sending a solar sail to rendezvous and ride along with Halley's Comet during its pass in 1986.

喷气推进实验室的科学家们甚至考虑在1986年哈雷彗星经过时发射一个太阳帆与它会合，并沿着它的轨迹飞行。

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NASA plans to test a full-size solar sail for chemical-free propulsion and a deep space atomic clock.

此外，美国国家航空航天局（下文简称NASA）还计划测试一个完整尺寸的太阳帆，为航天器提供绿色推进能源，以及测试一个深空原子钟。

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Part of the ship's propulsion system failed on Monday, meaning it was forced to sail at speeds 10% lower than usual.

BBC: Cunard's Queen Victoria cruise ship