December 10, 2009

Bright Blazar Flare Captured By Fermi

A galaxy located billions of light-years away is commanding the attention of NASA’s Fermi Gamma-ray Space Telescope and astronomers around the globe. Thanks to a series of flares that began September 15, the galaxy is now the brightest source in the gamma-ray sky — more than ten times brighter than it was in the summer. Astronomers identify the object as 3C 454.3, an active galaxy located 7.2 billion light-years away in the constellation Pegasus. But even among active galaxies, it’s exceptional. Credit: NASA/DOE/Fermi LAT Collaboration

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