Janhunen says it would take a 440-pound (200-kilogram) spacecraft using an electric sail less than five years to travel between Earth and dwarf planet Pluto.

Janhunen说，采用该电驱动帆作为动力，440磅(200千克)重的航天器从地球飞到冥王星所需时间少于5年。

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1930 - The planet Pluto is officially named.

1930年的今天，冥王星被正式命名。

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1978 - Charon, a satellite of the planet Pluto, is discovered.

1978年的今天，冥王星的冥卫一卫星被发现。

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He died long before the search for Planet X resulted in the discovery of Pluto.

VOA: special.2010.07.11

Here, just so you can compare, are photos that the Hubble Space Telescope took of the planet Pluto, the outermost planet.

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The Sun enters Scorpio and aspects every slower planet except Pluto, and there's an intense Mars-Jupiter opposition.

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Astronomers today gave Pluto the heave ho, voting in an official definition for the word planet that leaves Pluto out.

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