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

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Original file ‎(Ogg multiplexed audio/video file, Theora/Vorbis, length 1 min 45 s, 1,280 × 720 pixels, 5.22 Mbps overall)

Summary

This animation tracks several gamma rays through space and <a href="//commons.wikimedia.org/wiki/Category:Time" title="Category:Time">time</a>, 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 <a href="//commons.wikimedia.org/wiki/Tungsten" title="Tungsten">tungsten</a> 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.

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Date/TimeThumbnailDimensionsUserComment
current17:01, 3 January 20171 min 45 s, 1,280 × 720 (65.53 MB)127.0.0.1 (talk)This animation tracks several gamma rays through space and <a href="//commons.wikimedia.org/wiki/Category:Time" title="Category:Time">time</a>, 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 <a href="//commons.wikimedia.org/wiki/Tungsten" title="Tungsten">tungsten</a> 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.
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