Planetary Science

  1. Planetary Science

    Titanic Images, Groovy Shots: Cassini arrives at Saturn

    After a 7-year, 3.5-billion-mile journey, the Cassini spacecraft last week slipped through a gap between two of the icy rings circling Saturn and became the first spacecraft to orbit the distant planet.

  2. Planetary Science

    Cometary encounter

    Planetary scientists are feasting on close-up images of Comet Wild 2 as well as on the first information about its composition.

  3. Planetary Science

    NASA postpones plans for Mars samples

    Still reeling from the failure of its two most recent missions to Mars, NASA announced late last month that it would delay by nearly a decade plans to bring back samples from the Red Planet.

  4. Planetary Science

    When storms collide on Jupiter

    Astronomers have for the first time witnessed two giant storms merging on Jupiter.

  5. Planetary Science

    Portrait of Phoebe: Cassini images a large Saturn moon

    The Saturn-bound Cassini spacecraft took the first close-up images ever recorded of one of Saturn's oddest moons, Phoebe.

  6. Planetary Science

    Rovers in overtime

    NASA has extended the missions of the twin Mars rovers by 5 months, through September 2004.

  7. Planetary Science

    New moons for Saturn

    Astronomers reported the discovery of four new moons orbiting Saturn.

  8. Planetary Science

    Threat to Titan mission deepens

    If a communications problem between the Huygens probe and its mother craft is not corrected, as much as two-thirds of the data gathered by the probe during its 2004 descent through Titan's atmosphere could be lost.

  9. Planetary Science

    Cassini spies storms on Saturn

    Closing in on Saturn after a 7-year journey, the Cassini spacecraft has discovered two storms merging on the ringed planet, only the second times that scientists have observed such a phenomenon.

  10. Planetary Science

    Martian Methane: Carbon compound hints at life

    The presence of methane in the Martian atmosphere spotlights the possibility that there might be primitive life on the Red Planet.

  11. Planetary Science

    Signs of Water Flow: Oceans of data point to ancient Martian sea

    A robotic rover on Mars has found strong evidence that some rocks near the Martian equator were laid down by a shallow, ancient ocean, indicating one of the most likely places to look for remains of life on the Red Planet.

  12. 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.