Friday, April 15, 2011

NASA has released a trove of data from its sky-mapping mission

Spectacular sky-mapping archive open to the public

Article Excerpt: "... University of Alabama astronomer William Keel already started mining the database for quasars - compact, bright objects powered by super-massive black holes.

"If I see a galaxy with highly ionized gas clouds in its outskirts and no infrared evidence of a hidden quasar, that's a sign that the quasar has essentially shut down in the last 30,000to 50,000 years," Keel said. ..."

Reference: www.cbsnews.com