Planetary Science

  1. Planetary Science

    Revisiting a forgotten planet

    Engineers are readying a NASA spacecraft for a May 11 launch to Mercury, one of the least-explored planets in the solar system.

  2. Planetary Science

    Radio link may hamper a Titan probe

    A recently discovered communications problem could prevent the Huygens probe from relaying all of its precious data when it parachutes through the cloud-bedecked atmosphere of Saturn's largest moon, Titan, in 2004.

  3. Planetary Science

    A New Flight Plan

    President Bush recently unveiled an ambitious plan for a manned mission to Mars, using the moon as a testing area and stepping-stone, but for many planetary scientists the moon is a desirable destination in and of itself.

  4. Planetary Science

    Red Planet Makes a Splash: Rover finds gush of evidence for past water

    A robotic rover on Mars has gathered what scientists are calling the best evidence to date that liquid water once flowed on the Red Planet.

  5. Planetary Science

    A view of Mars, European style

    Although the Mars lander Beagle 2 is presumed dead, its mother craft, the European Space Agency's Mars Express, has transmitted its first data from a polar orbit about the Red Planet.

  6. Planetary Science

    Red Planet Roundup: Opportunity knocks; Spirit revives

    The NASA rover Opportunity bounced onto an equatorial Martian plain early on Jan. 25 and found an intriguing outcropping of rocks on the other side of the planet from where its ailing but recovering twin, Spirit, had recently stalled.

  7. 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.

  8. 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.

  9. Planetary Science

    Journey to Mars

  10. 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.

  11. 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.

  12. 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.