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1999

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  • Learning how to make a clean sweep in space

    Nov. 30, 1999

    How do you clean dust in space where a vacuum cleaner won't work? A solution starts with understanding how a single grain of dust - in this case, like that from rocket motors - behaves in space.

  • Dashing and Coasting to the Interstellar Finish Line

    Aug. 19, 1999

    A race to the edge of the solar system and into interstellar space could come out of a contract awarded recently by NASA for the University of Washington to develop an innovative space propulsion concept. The Mini-Magnetospheric Plasma Propulsion - M2P2 - would use the solar wind to push on a small imitation of the Earth's magnetosphere and accelerate the spacecraft to overtake the Pioneers and Voyagers and become the first manmade object to leave the solar system.

  • Chandra peers into the Large Magellanic Cloud

    Nov. 2, 2006

  • Life on the Edge

    Jan. 13, 1999

  • The shape of extraterrestrial life

    May 19, 1999

  • features

    March 31, 2010

  • Welcome to the Thunder Dome

    April 26, 1999

    Climate scientists report that urbanization has altered weather patterns over Atlanta, Georgia. Data collected for the last 25 years link deforestation and the use of heat-absorbing materials with oddities such as severe morning weather.

  • Lightningfollows the Sun

    June 10, 1999

    Tantalizing findings show patterns of Lightningvary with the Sun, El Nino, and other phenomena. Such correlations could provide a way to monitor global changes.

  • Leonids Sample Return Mission Update

    April 1, 1999

    Scientists will describe initial results from a program to catch meteoroids in flight at the NASA/Ames Leonids Workshop April 12-15, 1999.

  • A Richter Scale for Cosmic Collisions

    July 22, 1999

    Planetary scientists have developed the Torino Scale, a new means of conveying the risks associated with Asteroidsand Cometsthat might collide with the Earth.