Skip all navigation and jump to content Jump to site navigation Jump to section navigation.
NASA Logo - Goddard Space Flight Center + Visit

+ Advanced Search
View Most Recently Released Imagery
View Gallery of Imagery: A topical collection of SVS Imagery
Search Imagery by the keywords assigned to it
Search Imagery by the instruments that supplied data for a visualization product
Search Imagery by the series of visualizations that have been produced
Search Imagery by the scientist providing the data used in a visualization product
Search Imagery by the animator that created the product
Search Imagery by the identification number assigned to the visualization product
See other search options

  + RSS Feeds
  + Podcasts
blank image
Previous Animation Number   Next Animation Number
Fermi Observation of Early Background Light Animation

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.
Share: Share via E-mail E-mail   Share on TwitterTwitter
Another multimedia item related to this story:
     NASA's Fermi Explores the Early Universe (id 11117)

Artist's rendering of the process described above.    Artist's rendering of the process described above.
Duration: 1.3 minutes
Available formats:
  1280x720 (59.94 fps) QT         1 GB
  1280x720 (60 fps) Frames
  1280x720 (59.94 fps) QT         1 GB
  1280x720 (29.97 fps) QT         137 MB
  1280x720 (30 fps) QT         43 MB
  1280x720 (29.97 fps) MPEG-4   53 MB
  1280x720   TIFF         2 MB
  640x360 (29.97 fps) QT         38 MB
  960x540 (59.94 fps) WEBM         22 MB
  1280x720   JPEG         48 KB
  320x180     JPEG         20 KB
How to play our movies

Still from animation    Still from animation

Available formats:
  1280 x 720       TIFF       2 MB
  1280 x 720       JPEG   116 KB

Still from animation    Still from animation

Available formats:
  1280 x 720       TIFF       2 MB
  1280 x 720       JPEG   186 KB

still from animation    still from animation

Available formats:
  1280 x 720       TIFF       2 MB
  1280 x 720       JPEG   181 KB

Short URL to This Page:
Animation Number:11130
Animator:Cruz DeWilde (Avant Gravity) (Lead)
Producers:Scott Wiessinger (USRA)
 Francis Reddy (Syneren Technologies)
Writer:Francis Reddy (Syneren Technologies)
Platform/Sensor/Data Set:Fermi
Series:Astrophysics Animations
Goddard TV Tape:G2012-104 -- Fermi EBL Media Telecon
Please give credit for this item to:
NASA/Goddard Space Flight Center/Cruz deWilde
SVS >> Galaxy
SVS >> Gamma Ray
SVS >> Ultraviolet
SVS >> Black Hole
SVS >> Astrophysics
SVS >> Universe
SVS >> Space
SVS >> Fermi
SVS >> Blazar
SVS >> Star
NASA Science >> Universe

Back to Top
Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version logo - the U.S. Government's official Web portal. + Privacy Policy and Important Notices
+ Reproduction Guidelines
NASA NASA Official:
Content Contact: