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This week's gamma-ray blast is the latest in a 30-year tale of cosmic discovery
decaying X-ray source, with a position (accurate to somewhat less than an arcminute) that coincided with that of the optical star that disappeared. Clearly, the X-ray and optical afterglow of a GRB had been detected for the first time. Further conformation t...
Arctic Ice Revealed
RADARSAT satellite. The Arctic is the smallest of the world's four oceans, but it may play a large role in helping scientists monitor Earth's climate shifts. Using RADARSAT's special sensors to take images at night and to peer through clouds, NASA r...
Anticipating Earthquakes
more informationGlobal Earthquake Satellite System -- home page Final GESS report -- results of the GESS study, with a 20 year plan for deploying a satellite network for monitoring signs of impending earthquakes. "There's a lot of...
Hot X-rays from a Cold Comet
dusty gas surrounding the rapidly vaporizing core might scatter a small number of high-energy photons from the Sun, producing a faint x-ray halo. Astronomers using ROSAT decided to look at Hyakutake and they were shocked by what they saw. ROSAT images revea...
Brainy 'Bots
adjusted the next time a similar object is encountered. Fuzzy logic is already in use today in software such as computer speech and handwriting recognition programs, which learn to perform better through "training." Above: The combination of fuzzy logic and ...
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