An ion thruster test for NASA's Deep Space 1.

对于美国宇航局的离子推进器测试深空1号。

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NASA developed a similar engine for its Deep Space 1 Mission, launched in 1998, but the new thruster has advantages.

NASA在1998年所发射的“深空一号”也曾使用类似的引擎，但相较而言，这个新型的推进器有自己的优势。

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As for mission duration under powered space flight, Deep space 1 gets to keep that record for another few months until Dawn eclipses that record as well on August 10.

在动力航天的任务期限内，深空1号保持了几个月的记录，直到8月10号曙光号改写了记录。

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Other spacecraft have come close to asteroids but never nearly as close as Deep Space 1.

CNN: Spacecraft set for risky asteroid flyby

The launch of NASA's Deep Space 1 aboard Boeing Delta 7326 rocket is scheduled for Cape Canaveral, Florida.

CNN: Saturday,

The Deep Space 1 spacecraft is scheduled at 12:46 a.m. to come within 15 kilometers (10 miles) of an asteroid called Braille.

CNN: Spacecraft set for risky asteroid flyby