Space

  1. Space

    Gravity Tractor as Asteroid Mover

    A huge spacecraft could use its gravity to keep an asteroid from hitting Earth.

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  2. Planets

    Pluto’s New Moons

    Astronomers have spotted two objects that may be previously unknown moons of Pluto.

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  3. Planets

    Saturn’s Spongy Moon

    Close-up views of Saturn's moon Hyperion reveal a strangely cratered surface that looks spongy.

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  4. Planets

    An Icy Blob of Fluff

    Firing a projectile into a comet has exposed an icy dirtball.

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  5. Space

    Asteroid Moons

    Astronomers have spotted an asteroid with two moons.

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  6. Planets

    A Smashing Display

    A space probe slams into a comet and sends up a mighty cloud of dust.

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  7. Space

    World of Three Suns

    A planet in the Milky Way tightly orbits the main star of a stellar trio.

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  8. Planets

    Cousin Earth

    Astronomers have found a solid, Earthlike planet just 15 light-years beyond the solar system.

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  9. Planets

    Chaos Among the Planets

    The screwball travels of four giant planets may have reshaped the early solar system.

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  10. Space

    Killers from Outer Space

    A newly revised scale rates the risk that an asteroid may crash into Earth and wipe out life as we know it.

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  11. Planets

    Solving a Sedna Mystery

    Astronomers are learning more about the most-remote object known in the solar system.

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  12. Space

    Return to Space

    NASA is readying the space shuttle Discovery for its first launch in more than 2 years.

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