Archive: 03/13/2012

The origins of a torus in a galactic nucleus

(PhysOrg.com) -- Quasars are among the most energetic objects in the universe, with some of them as luminous as ten thousand Milky Way galaxies. Quasars are thought to have massive black holes at their cores, ...

dateMar 13, 2012 in Astronomy
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X-ray monitoring mission comes to an end

On Dec. 30, 1995, NASA’s Rossi X-ray Timing Explorer (RXTE) was launched into orbit on a mission to observe and study X-ray sources in space. For 16 years, the satellite circled Earth, detecting X-rays ...

dateMar 13, 2012 in Space Exploration
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