Assertion: universe | /r/HasProperty | dominated by radiation
Facets:
Source sentences:
text: Thus, although the energy density of the universe is now dominated by matter, it was once dominated by radiation; poetically speaking, all was light.
text: The observed isotropy of the CMB is problematic in this regard: if the universe had been dominated by radiation or matter at all times up to the epoch of last scattering, the particle horizon at that time would correspond to about 2 degrees on the sky.