As the comet nears the sun, its ice melts, releasing gas and dust that stream away into space.

当彗星靠近太阳时，它的冰层融化，释放的气体和尘埃飘向太空。

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In 2005, a NASA science mission called Deep Impact crashed an 816-pound copper mass into a comet to learn more about its icy interior.

2005年，美国宇航局的一项叫做深度撞击的科学任务，是用一块816磅重的铜质物体撞击一颗彗星，以了解其内部更冰冷的物质。

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Deep impact first visited comet Tempel 1 in 2005, crashing an impactor into the comet to help scan its composition from afar.

“深度冲撞”号于2005年第一次造访了彗星Tempel 1，为了分析该彗星的构成，它抛出了一个冲撞器。

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There, he collapses backward as Stravinsky's final, bleating note cues the escape from within the proscenium space of a silky wisp of pure-white fabric, sending it like a comet into the auditorium ceiling.

WSJ: A Puppeteer's 'Rite' of Passage | Basil Twist | By Robert Greskovic

These were formed when an asteroid or comet smacked into the lunar or Martian surface and threw out debris that fell into Earth's gravitational grasp.

WSJ: Russia Meteor Was Largest in More Than a Century

It opened its first store in 1968, in Hull, and was bought by Kingfisher in 1984, which expanded the Comet brand into one of the most familiar names on the High Street.

BBC: Comet retailer to go into administration