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  • Cosmic Bar Codes

    2000April 6, 2011

    The Chandra X-ray Observatoryhas peered into the nucleus of a distant galaxy and detected warm gas flowing away from a black hole. The spectrum of active galaxy NGC 5548 is the most precise of its kind ever made with an x-ray telescope.

  • The Incredible Ions of Space Propulsion

    2000April 6, 2011

    After nearly 40 years of development and the successful flight of Deep Space 1in 1998-1999, ion propulsion has now entered the mainstream of propulsion options available for deep-space missions.

  • Ursid Meteor Surprise

    2000Sept. 20, 2011

    The normally meek Ursid meteor shower could surprise sky watchers with a powerful outburst on Dec 22nd when Earth passes through a dust stream from periodic comet Tuttle.

  • Breathing Easy on the Space Station

    2000Sept. 20, 2011

    Life support systems on the International Space Stationprovide oxygen, absorb carbon dioxide, and manage vaporous emissions from the Astronautsthemselves. It's all part of breathing easy in our new home in space.

  • Some CometsLike it Hot

    2000April 6, 2011

    Amateur astronomers are discovering pieces of a giant comet that broke apart in antiquity as the fragments zoom perilously close to the Sun. You can join the hunt, too. All you need is a computer and an internet connection to view realtime data from the orbiting ESA/NASA Solar and Heliospheric Observatory.

  • Now Just a Blinkin' Picosecond!

    2000April 6, 2011

    NASA scientists are working to solve the need for computer speed using light itself to accelerate calculations and increase data bandwidth. Research in Optical Computingtechnology is helping to fuel a worldwide boom in photonics development.

  • 5/5/2000: The Meteor Shower

    2000April 6, 2011

    The eta Aquarid meteor shower, caused by bits of debris from Halley's Comet, will peak on May 5-6, 2000. Lunar observers will be watching The Moonon the nights after the shower for possible signs of meteorite impacts.

  • An Asteroid goes to the Dogs

    2000Sept. 20, 2011

    NASA astronomers have collected the first-ever radar images of a "main belt" asteroid. It's a metallic, dog bone-shaped rock the size of New Jersey, apparently sculpted during an ancient, violent cosmic collision. The asteroid, named 216 Kleopatra, was discovered in 1880, but until now, its shape was unknown.

  • A Good Month for Asteroids

    2000April 6, 2011

    September has been a good month for astronomers studying Near-Earth Asteroids(NEAs). No fewer than five sizable minor planets have flown past our planet since the beginning of the month, affording astronomers a close-up look at these ever-scary space rocks.

  • Audacious & Outrageous: Space Elevators

    2000Sept. 20, 2011

    Science-fiction writer Arthur C. Clarke was once asked when the "space elevator," a notion he helped to popularize, would become a reality. Clarke answered, "Probably about 50 years after everybody quits laughing." Nowadays NASA scientists are taking the idea seriously.