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extragalactic background light

extragalactic background light noun: all the accumulated radiation in the universe due to star formation processes, plus a contribution from active galactic nuclei (AGNs).

Noun

extragalactic background light (uncountable)

  1. All the accumulated radiation in the universe due to star formation processes, plus a contribution from active galactic nuclei (AGNs).
    • An international group of researchers has developed a new way to measure accurately the extragalactic background light (EBL) that fills the universe. The technique involves measuring the attenuation of high-energy gamma rays from distant blazars and it could improve our understanding of how...2013 March 27, Tushna Commissariat, “Blazars help measure extragalactic background light”, in PhysicsWorld
    • Ground-based observatories have been collecting 0.2 - 20 TeV gamma rays from blazars for about twenty years. These gamma rays can experience absorption along the line of sight due to interactions with the extragalactic background light (EBL). In this paper, we show that the gamma-ray optical depth...2015, Jonathan Biteau, David A. Williams, "The extragalactic background light, the Hubble constant, and anomalies: conclusions from 20 years of TeV gamma-ray observations", arXiv; (1502.04166) [14...
    Synonyms:
    EBL, AGNs

Examples of extragalactic background light in a sentence

  • An international group of researchers has developed a new way to measure accurately the extragalactic background light (EBL) that fills the universe.2013 March 27, Tushna Commissariat, “Blazars help measure extragalactic background light”, in PhysicsWorld:
  • These gamma rays can experience absorption along the line of sight due to interactions with the extragalactic background light (EBL).2015, Jonathan Biteau, David A. Williams, "The extragalactic background light, the Hubble constant, and anomalies: conclusions from 20...

Synonyms of extragalactic background light

Origin of extragalactic background light

From extragalactic + background + light.

Questions about extragalactic background light

What does extragalactic background light mean?
Extragalactic background light means all the accumulated radiation in the universe due to star formation processes, plus a contribution from active galactic nuclei (AGNs).
How do you use extragalactic background light in a sentence?
An international group of researchers has developed a new way to measure accurately the extragalactic background light (EBL) that fills the universe.
What part of speech is extragalactic background light?
Extragalactic background light is a noun.

Words near extragalactic background light in the dictionary

  1. extrafoveal
  2. extrafoveally
  3. extraframework
  4. extrafusal
  5. extragalactic
  6. extragalactic background light
  7. extragalactically
  8. extraganglionic
  9. extragastric
  10. extragastrically
  11. extragastrointestinal

Source and license

Adapted from Wiktionary: extragalactic background light (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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