Planets

  1. Planets

    Planets on the Edge

    The discovery of a strange, planetlike object beyond Pluto adds to the puzzle of how the solar system formed.

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  2. Planets

    Rover Makes Splash on Mars

    A robot on Mars has gathered evidence that liquid water once flowed on the Red Planet.

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  3. Planets

    Roving the Red Planet

    Two little robots have touched down on Mars, ready to study the planet's rocks and soil.

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  4. Planets

    Catching a Comet’s Tail

    A closeup visit by a NASA spacecraft helps show how a comet gets its shape.

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  5. Earth

    Killer space rock snuffed out ancient life

    Rock fragments from Antarctica suggest a huge meteor struck Earth 250 million years ago.

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  6. Planets

    A planet from the early universe

    Astronomers have found the oldest and most distant planet known in the universe.

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  7. Planets

    Melting Snow on Mars

    Melting blankets of snow may have carved out Martian gullies.

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  8. Planets

    A planet’s slim-fast plan

    A planet orbiting very close to its sun can quickly lose weight.

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