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What are some natural sources of gamma rays?

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Gamma rays are emitted when nuclei of radioactive elements decay (Radium and uranium, and technetium come to mind.) The are also produced during nuclear fission. read more

Gamma rays are emitted when nuclei of radioactive elements decay (Radium and uranium, and technetium come to mind.) The are also produced during nuclear fission. (Nuclear reactors, the sun, supernovae, and other high energy objects also produce gamma rays than may arrive on earth. read more

A new map combining nearly three months of data from NASA's Fermi Gamma-ray Space Telescope is giving astronomers an unprecedented look at the high-energy cosmos. To Fermi's "eyes", the universe is ablaze with gamma rays from sources within the solar system to galaxies billions of light-years away. read more

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