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View Full Version : Watching Gamma Rays from the Safety of Earth



Fraser
2005-Sep-08, 01:09 PM
SUMMARY: Astronomers aren't stuck looking at plain old light any more. There's a whole electromagnetic spectrum out there, ready to be explored, from 21cm hydrogen radio-waves through microwave, infrared, ultraviolet, x-rays, to gamma rays and beyond, astronomers have instruments for all seasons and all wavelengths. High-energy gamma rays are blocked by the Earth's atmosphere - which is good for our health - but astronomers can still see them thanks to a process called Cherenkov radiation telescopy.

View full article (http://www.universetoday.com/am/publish/hess_observations.html)
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