NASA: Fermi Probes "Dragons" of the Gamma-ray Sky

Find out the latest thinking about our universe.
User avatar
bystander
Apathetic Retiree
Posts: 20663
Joined: Mon Aug 28, 2006 2:06 pm
Location: Oklahoma

NASA: Fermi Probes "Dragons" of the Gamma-ray Sky

Post by bystander » Tue Mar 02, 2010 7:44 pm

NASA's Fermi Probes "Dragons" of the Gamma-ray Sky
NASA Fermi Mission News - 2010 March 02
One of the pleasures of perusing ancient maps is locating regions so poorly explored that mapmakers warned of dragons and sea monsters. Now, astronomers using NASA's Fermi Gamma-ray Space Telescope find themselves in the same situation as cartographers of old. A new study of the ever-present fog of gamma rays from sources outside our galaxy shows that less than a third of the emission arises from what astronomers once considered the most likely suspects -- black-hole-powered jets from active galaxies.
Universe's Energetic Cosmic Fog Stumps Scientists: Space.com