Word: x-rays
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...that when the station pays off with big discoveries? Even then, it's hard to say what the public should expect. NASA's Mars probes, and its orbiting observatories like the Hubble Space Telescope and Chandra X-Ray Observatory, have clearly defined missions, something the ISS lacks. Astronauts can study the long-term effects of weightlessness on their own bones and muscle, as they have since the 1970s, but it's hard to say what benefit will be derived back on Earth. In fact, the first important science study done onboard will try to determine whether the station is even...
...neighbor ravenously slurp salsa off his fingertips. For some, the day becomes a covert Budweiser-consumption competition. For others, any sign of physical weakness in the football players elicits a joyous chorus of "sissy" and "wimp." When the quarterback of the Ravens hustled off the field to get an x-ray of his left hand, a resident Hercules yelled, "Put on a bandage and suck it up. This is the damn Super Bowl...
...first study - both reports appeared in the February issue of the American Journal of Roentgenology - tried to quantify the risk from pediatric CAT scans. CAT is a high-tech tool that uses multiple X-ray images to create 3-D views of a patient's internal organs. CAT scans clearly help doctors diagnose and treat disease, but as two recent studies suggest, the radiation dose they deliver also poses risks, especially for children and particularly since the use of CAT scans to diagnose appendicitis, for example, has become so widespread...
According to relativity theory, very massive stars--about three times heavier than the sun--eventually collapse to become black holes. In the past, astronomers had assumed that the extremely massive objects in x-ray novae were black holes...
Researchers used the sophisticated Chandra X-ray Observatory, an orbiting satellite launched about a year and a half ago by the National Aeronautics and Space Administration (NASA...