Chandra Scores A Double Bonus With A Distant Quasar Two discoveries from a distant quasar - an enormous X-ray jet and an X-ray shadow cast by an intervening galaxy - are giving astronomers using NASA's Chandra X-ray Observatory cause to be doubly excited. These two independent results reveal information about a supermassive black hole at the center of the quasar as well as the amount of oxygen in a distant galaxy billions of years ago. Full Store...

NASA's HESSI spacecraft aims to unravel an explosive mystery: the origin of solar flares. Feb.6, 2002 -- Astronauts love space walks. Floating weightless hundreds of kilometers above Earth, the terrain below racing by at 17,000 mph --no space traveler wants it to end. But it only takes two words to send one of those brave explorers racing back to their craft: "Solar flare!" Learn more...

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Three NASA spacecraft have chronicled the devastation caused by the Jan. 17 eruption of the Nyiragongo volcano in Congo.The African eruption killed more than 100 people and forced the evacuation of hundreds of thousands more.Learn more...

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