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  • Space Charge

    Aug. 6, 2008

  • New Evidence for Black Holes

    Jan. 12, 2001

    By seeing almost nothing, astronomers say they've discovered something extraordinary: the event horizons of Black Holesin space.

  • Mixed Up in Space

    Aug. 7, 2001

    Humans can become confused and disoriented (and even a little queasy) in an alien world where up and down have no meaning.

  • Dawn of a New Ozone Hole

    Sept. 17, 2001

    Our planet's Antarctic ozone hole is opening once again as Spring approaches in the southern hemisphere -- and scientists say it's a big one.

  • Black Hole Snacks

    Sept. 5, 2001

    NASA's Chandra X-ray Observatoryhas spotted a curious outburst from our galaxy's core -- a sign that the Milky Way's central black hole may be snacking on its neighbors.

  • The Transparent Sun

    April 27, 2001

    Giant sunspot 9393 is making a rare second transit across the face of the Sun. Its unusual reappearance came as no surprise to scientists who tracked the behemoth by peering right through our star.

  • Solving Charles Darwin's 'Abominable Mystery'

    April 17, 2001

    About 130 million years ago the first flowering plants suddenly appeared -- an event Charles Darwin described as an 'abominable mystery.' Now, scientists using chemical fossils are unraveling this ancient puzzle.

  • Back-to-School Time for Astrobiologists

    March 30, 2001

    NATO and NASA are joining forces to host an Advanced Study Institute for students and practitioners of astrobiology.

  • A Milky Way Primer

    Aug. 6, 2008

  • The Fading Milky Way

    Nov. 1, 2001

    Light pollution is a growing environmental problem that threatens to erase the night sky before its time.