• 18 Jan 2000

    NASA may soon deliberately crash a scientific satellite into the ocean. The reason?

  • 13 Jan 2000

    SAN FRANCISCO--Scientists have discovered the first solid evidence that plate tectonics are not unique to Earth. New data suggest that parts of Mars, too, may have been shaped by plate tectonics early in the planet's history.

  • 13 Jan 2000

    ATLANTA--From the fringes of the universe to nearby parts of our own galaxy, black holes are becoming more than bit players on the cosmic stage.

  • 13 Jan 2000

    ATLANTA--For 40 years, astronomers have been baffled by a faint glow of x-rays lighting up the entire sky. Now they think they have solved the mystery of the glow's origins.

  • 12 Jan 2000

    ATLANTA--Scientists have long been fascinated by the idea that the first life-forms on Earth could have been deposited on our planet after arising somewhere else in the solar system.

  • 12 Jan 2000

    Chances that life on Earth will be blighted by an asteroid strike are only half as high as previously assumed, according to a report in tomorrow's Nature.

  • 11 Jan 2000

    Squeezing yet more data out of an aging spacecraft, researchers announced yesterday that Galileo's close flyby of Jupiter's moon Europa last week has provided "very strong" evidence that an ocean of salty water covers the Jovian moon.

  • 10 Jan 2000

    Just in time for this week's opening of the big-screen thriller Supernova, astronomers have assembled a portrait of a real-life star in our galaxy that blew up 300 years ago.

  • 7 Jan 2000

    Astronomers have taken their first detailed look at Pluto's companion Charon, the most distant known moon in the solar system.

  • 5 Jan 2000

    Spurred by pressure from lawmakers, the British government has established a three-person committee to study the risk of catastrophic asteroid impacts--and what the U.K. might do to help prevent them.

  • 22 Dec 1999

    Best known, perhaps, for first spotting a gravitational lens--the telltale starlight and radio waves bent by the gravity of a massive object--in 1979, Britain's aging Lovell radio telescope is about to be burnished into a more useful instrument for studying the cosmos.

  • 17 Dec 1999

    SAN FRANCISCO--Astronomers are galvanized by a new image of what may be a curtain of lava spewing above a volcano on Jupiter's moon Io.

  • 16 Dec 1999

    In addition to the Breakthrough of the Year, Science recognizes nine additional major discoveries in fields that span the universe, from the edgy dance of subatomic particles to the biological wizardry that imprint

  • 15 Dec 1999

    An intrepid Frenchwoman is skiing across virgin antarctic ice fields, looking for meteorites. On 22 November, Laurence de la Ferrière, 42, caught a lift to the South Pole, from which she set off on her 3000-kilometer trek.

  • 15 Dec 1999

    SAN FRANCISCO--The luminous curtains of color that shimmer in the polar skies have dark companions, a satellite has revealed.

  • 13 Dec 1999

    SAN FRANCISCO--The solar wind, a steady gale of high-energy particles from the sun, died down to a mere zephyr for more than a day earlier this year.

  • 10 Dec 1999

    Annie Jump Cannon, who established astronomy's system for classifying different types of stars, was born on 11 December 1863. The American studied physics at Wellesley College in Massachusetts, then worked for the rest of her career at the Harvard College Observatory.

  • 10 Dec 1999

    To the relief and delight of engineers and x-ray astronomers, Europe's new space workhorse, the Ariane 5, today deposited a $640 million x-ray observatory into orbit.

  • 8 Dec 1999

    What are Uranus and Neptune doing so far from the sun? The question has puzzled theorists for decades. According to a new model, sibling rivalry might be to blame for their banishment.

  • 6 Dec 1999

    NASA has all but given up on the Mars Polar Lander, which descended into the Martian atmosphere on Friday but hasn't been heard from since. Space scientists say they may never know what doomed the $165 million spacecraft.

  • 30 Nov 1999

    Planets around other stars are finally coming into focus. Early last week, astronomers said they had twice seen a Jupiter-sized exoplanet cross the face of its parent star, an observation that confirmed an earlier, less certain report and nailed the planet's mass, size, and density.

  • 29 Nov 1999

    Scientists today announced the detection of six new planets outside our solar system, bringing the total to 28. All the new planetary systems, to be described in an upcoming issue of Astrophysical Journal, have much more elliptical orbits than the planets in our solar system.

  • 23 Nov 1999

    Finally, some news to soothe the millennial jitters. Not. The odds are higher than you might expect that before Y3K, an asteroid will plunge into the ocean and trigger a powerful surge of water called a tsunami that inundates shorelines somewhere, researchers say.

  • 19 Nov 1999

    WASHINGTON, D.C.--Planetary scientists today revealed stunning new pictures of a volcanic moon run wild.

  • 17 Nov 1999

    Astronomers say they are startled by a new analysis showing that Jupiter contains much higher amounts of the rare noble gases than expected. The findings, published in tomorrow's Nature, will force theorists to revise their models of how the king of planets formed.