Planetary Science

  1. Planetary Science

    Spirit Gets Its Wheels Dirty: Mars rover begins scientific work

    Spirit, the rover that landed on Mars on Jan. 3, last week began studying the rocks and soil at its landing site.

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  2. Planetary Science

    A Tale of Two Landers: NASA’s Spirit phones home, but Europe’s Beagle 2 remains mum on Mars

    NASA's Spirit rover sent its first signals home soon after it touched down on Mars Jan. 3, but European Space Agency scientists haven't yet heard from their Beagle 2 lander, which dropped to the surface of Mars on Dec. 24.

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  3. Planetary Science

    Journey to Mars

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  4. Planetary Science

    Lunar finding doesn’t hold water

    A new radar study of craters at the moon's north and south poles reveals that neither region contains substantial amounts of frozen water.

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  5. Planetary Science

    Next Stop, Interstellar Space

    Data recorded by the venerable Voyager 1 spacecraft suggest the craft has either recently encountered or will soon enter a key region near the edge of the solar system.

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  6. Planetary Science

    Did rivers once run on the Red Planet?

    A fan-shaped region of debris on Mars is providing new evidence that some places on the Red Planet, now bone-dry, once had long-lasting rivers or lakes.

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  7. Planetary Science

    Did rivers once run on the Red Planet?

    A fan-shaped region of debris on Mars is providing new evidence that some places on the Red Planet, now bone-dry, once had long-lasting rivers or lakes.

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  8. Planetary Science

    Martian sand ripples are taller than Earth’s

    New data gathered by a Mars-orbiting probe suggest that large ripples found in sandy areas of the Red Planet are more than twice as tall as their terrestrial counterparts.

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  9. Planetary Science

    Giant picture of a giant planet

    The Saturn-bound Cassini spacecraft has taken the sharpest global portrait of Jupiter ever obtained, showing the planet's turbulent atmosphere in true color.

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  10. Planetary Science

    Moonopolies

    Recently discovered tiny satellites, all orbiting the outer planets in strange paths, may shed new light on a critical last phase in the formation of the planets.

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  11. Planetary Science

    Bone-dry Mars?

    The presence of large amounts of olivine, a mineral that undergoes rapid chemical transformation when exposed to liquid water, argues against ancient oceans or lakes on Mars.

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  12. Planetary Science

    Martian Invasion

    If all goes according to plan, three spacecraft—one in December, two in January—will land on the Red Planet, looking for evidence that liquid water once flowed on its surface.

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