Astrophysics (Index)About

dark age

(dark ages)
(interval when the universe's hydrogen atoms were neutral)

The dark age is the time between recombination when ions and electrons formed neutral hydrogen atoms, (around 380,000 years after the Big Bang or a redshift of 1090) and the epoch of reionization when hydrogen atoms once again split in large numbers, 150 million years after the Big Bang or some time between redshift 6 and 20. During this time, atoms were neutral and space was transparent but there were few light sources as yet (e.g., stars), thus all was dark.

(Big Bang,cosmology,hydrogen,ionization,early universe,recombination,EOR)
Further reading:
/Lookback Years
204.27Gpc13.91Glynearestdark age
10904.29Gpc13.98Glyfurthestdark age

Referenced by pages:
epoch of reionization (EOR)