File:NASA's Fermi Explores the Early Universe.ogv

NASA's_Fermi_Explores_the_Early_Universe.ogv ‎(file size: 65.53 MB, MIME type: application/ogg)

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Summary

Description	English: This animation tracks several gamma rays through space and time, from their emission in the jet of a distant blazar to their arrival in Fermi's Large Area Telescope (LAT). During their journey, the number of randomly moving ultraviolet and optical photons (blue) increases as more and more stars are born in the universe. Eventually, one of the gamma rays encounters a photon of starlight and the gamma ray transforms into an electron and a positron. The remaining gamma-ray photons arrive at Fermi, interact with tungsten plates in the LAT, and produce the electrons and positrons whose paths through the detector allows astronomers to backtrack the gamma rays to their source.
Date	19 October 2012
Source	Goddard Multimedia
Author	NASA/Goddard Space Flight Center

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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	Date/Time	Dimensions	User	Comment
current	13:26, 5 November 2012	(65.53 MB)	wikimediacommons>Originalwana	{{Information \|Description ={{en\|1=This animation tracks several gamma rays through space and time, from their emission in the jet of a distant blazar to their arrival in Fermi's Large Area Telescope (LAT). During their journey, t...

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