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.
Please give credit for this item to:
NASA/Goddard Space Flight Center/Cruz deWilde
MissionsThis visualization is related to the following missions:
SeriesThis visualization can be found in the following series:
TapesThis visualization originally appeared on the following tapes:
Fermi EBL Media Telecon
Thursday, November 1, 2012 at 4:00AM
Produced by - Robert Crippen
Datasets used in this visualization
Note: While we identify the data sets used in these visualizations, we do not store any further details, nor the data sets themselves on our site.