Planets

  1. Planets

    Icy Orbs at the Solar System’s Edge

    A ring at the solar system's outskirts appears to contain smaller objects than expected.

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  2. Planets

    A very distant planet says “cheese”

    A small red spot may be the first picture ever taken of a planet outside the solar system.

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  3. Planets

    Planet Hunters Nab Three More

    Astronomers have spotted three Neptune-size planets outside our solar system.

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  4. Planets

    Saturn’s New Moons

    The Cassini spacecraft has found evidence of lightning and two tiny moons orbiting the ringed planet.

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  5. Planets

    Ringing Saturn

    The Cassini spacecraft has arrived at Saturn to start exploring the planet and its rings and moons.

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  6. Planets

    Witnessing a Rare Venus Eclipse

    On June 8, Venus will cross in front of the sun for the first time since 1882.

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  7. Planets

    Search for a Missing Moon

    Sedna, the most distant object known in the solar system, doesn't appear to have a moon.

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  8. 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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  9. 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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  10. 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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  11. 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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  12. 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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