Concept
Cosmic Dark Ages
The long pre-starlight era of the universe.
The period between recombination and the formation of the first luminous objects, when the universe was filled with neutral hydrogen and no visible light.
Overview
The period between recombination and the formation of the first luminous objects, when the universe was filled with neutral hydrogen and no visible light.
See also
Dark Energy
The mysterious force accelerating the universe.
Gravity
The force that shapes the universe.
Redshift & Hubble's Law
The fingerprint of an expanding universe.
Baryon Acoustic Oscillations
A standard ruler frozen into the early universe.
Reionization Epoch
When the first stars and galaxies relit the universe.
Big Freeze
A possible cold, dark final fate of the universe.