09 Oct '11, 9am

Crab Nebula pulsar gamma rays energy amazing astronomers

Crab Nebula pulsar gamma rays energy amazing astronomers

An artist's conception of the pulsar at the center of the Crab Nebula, with a Hubble Space Telescope photo of the nebula in the background. Researchers using the Veritas telescope array have discovered pulses of high-energy gamma rays coming from this object. Credit: David A. Aguilar/NASA/ESA One millenium ago, around July 1054 CE to be exact, various rather inaccurate observers were stunned to watch a bright light in the sky for a month, both night and day. That was the Crab Nebula in creation. The light brighter than the Sun has gone, but nowadays we still receive gamma rays from the Crab Nebula's pulsar source, six million light years away. What is amazing astronomers is the sheer energy, even more than the first-seen light rays. Even a year ago, 100 GeV (electron - volts) was not expected from these pulses or anywhere else. In reality, 25GeV is the highest energy ever ...

Full article: http://www.earthtimes.org/scitech/crab-nebula-pulsar-gamm...

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