last scattering surface

noun

The horizon in the distant past of the universe at which photons ceased scattering from matter and were able to travel unimpeded to be observed in the present day.

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Meanings

nounlast scattering surface (plural last scattering surfaces)

plural last scattering surfaces

  1. astronomyThe horizon in the distant past of the universe at which photons ceased scattering from matter and were able to travel unimpeded to be observed in the present day.
Cite this entry
APA

last scattering surface. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/last%20scattering%20surface

MLA

“last scattering surface.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/last%20scattering%20surface. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “last scattering surface,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/last%20scattering%20surface.

Source: last scattering surface on Wiktionary, CC BY-SA 4.0.