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  • Small asteroid to pass Earth: NASA

    LOS ANGELES, June 24 (Xinhua) -- Near-Earth asteroid 2011 MD will whip past Earth on June 27, but will not pose any threat, NASA's Jet Propulsion Laboratory (JPL) said on Friday. The asteroid will pass only 12,000 kilometers (7,500 miles) above the E...

  • 英语游戏:Asteroids

    [全屏观看] 点击右键- 另存为 可保存这个Flash影片...

  • 英语游戏:Asteroid 2

    [全屏观看] 点击右键- 另存为 可保存这个Flash影片...

  • 英语游戏:Asteroid Miner

    [全屏观看] 点击右键- 另存为 可保存这个Flash影片...

  • SSS 2010-04-29

    This is Scientific American's 60-Second Science. I'm Karen Hopkin. Thisll just take a minute. Any school kid can tell you that comets are made of ice. That frozen water burning off is what gives comets their characteristic tails. But asteroids were g...

  • SSS 2009-01-06

    This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. If we want to learn more about our planet and other planets in the universe, we can get some help from stars that are long dead and gone. Thats what U....

  • 2006年VOA标准英语-Asteroid Approaches Earth: Destruction or Delig

    By Paul Sisco Washington, DC 07 July 2006 watch Asteroid report A major asteroid passed by the Earth this week, and another is heading this way. An asteroid visible in the night sky Asteroids are similar to comets and meteors. But they are larger, m...

  • 2006年VOA标准英语-Large Asteroid Has 'Close' Brush with Earth

    By Mike O'Sullivan Los Angeles 03 July 2006 A large asteroid, known as 2004 XP14, raced past the Earth early Monday. Scientists say it posed no threat to the planet, but serves as a reminder of the hazards encountered in space. -------- The rocky sp...

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