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from Wikipedia, the free encyclopedia

Gamma ray

Gamma rays are an energetic form of electromagnetic radiation produced by radioactive decay or other nuclear or subatomic processes such as electron-positron annihilation.

Gamma rays form the highest-energy end of the electromagnetic spectrum.

Note:   The above text is excerpted from the Wikipedia article "Gamma ray", which has been released under the GNU Free Documentation License.
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Space & Time News
November 27, 2015

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updated 12:56 pm ET