
24-February-2005, 04:37 PM
|
 |
Vulcan Moderator
|
|
Join Date: Oct 2001
Location: Greenbelt, MD
Posts: 24,214
|
|
Gamma rays from Earth!
Gamma Rays Come from the Earth Too
Quote:
|
Scientists were surprised a few years ago when the Compton Gamma Ray Observatory discovered bursts of gamma rays weren't only coming from deep space - some are coming from the Earth too. Further observations from NASA's RHESSI satellite has shown that approximately 50 Terrestrial gamma-ray flashes (TGFs) emanate from our planet every day, blasting out gamma rays for about a millisecond. What causes these TGFs is still unknown, but scientists believe they're caused by the build-up of electrical charge at the tops of thunderclouds.
|
__________________
Everything I need to know I learned through Googling.
|