Word: x-rays
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This region of super-heated gas, Elvis said, is shaped like a disk in NGC 1365’s quasar and is a source of X-ray radiation...
...also a visiting astrophysicist at the CFA—and his colleagues decided to delve deeper into the periodic eclipses of the NGC 1365 quasar’s emissions. Such eclipses are caused by clouds of gas that drift around the black hole, occasionally blocking X-ray radiation from reaching the earth...
...Originally the idea was that these gas clouds were a long way out, and so would take a long time to cover up the X-ray source,” Elvis said. “Now it’s so close, it’s almost ridiculous...
...Karni crossing that links Gaza to Israel. At present, some 30 to 40 trucks are manually searched each day, severely restricting the economic viability of export-oriented agriculture and dairy operations in Gaza. A new plan, drawn up by U.S. Army general Keith Dayton, envisages installing the same X-ray machines used to screen trucks at U.S. borders at Karni. By allowing up to 400 commercial trucks to pass from Gaza to Israel each day, the U.S. hopes to stimulate the Palestinian economy...
Questions have also been raised about the machine’s safety. X-ray exposure is generally considered unhealthy, so if passengers had to receive a hefty dose of them every time they were about to step on a plane, using the SmartCheck would be a blatant violation of civil liberties...