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Gamma rays stump astronomers: how novas generate flashes of high-energy light unclear.
There's a newfound source of gamma rays: explosions on the surfaces of stars. Figuring out how these novas generate such high-energy light might help astronomers understand the life cycle of certain stars and whether they evolve into more powerful explosions such as supernovas.
Over the last six years, the Fermi satellite has seen gamma radiation coming from a menagerie of sources such as pulsars and remnants of exploding stars, says Fermi team member Teddy Cheung of the U.S. Naval...
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