Cosmological History

Important Changes and Events > s.a. history of cosmological models.

Time	Size	Redshift	Temperature	Density	Comments
–1.37 1010 yr	0				Big Bang
+ tP					Quantum gravity effects
+1 sec			1010 K	5 105 g/cm3
+4 sec			5 109 K	3 104 g/cm3
+3 min			109 K		Nucleosynthesis starts
			1016 GeV		Grand Unification?
		1100			Decoupling, transition radiation → matter domination
+500,000 yr		1000	3000 K		Recombination, last scattering surface
+400 106 yr					Reionization – first stars
–1.0 1010 yr	1/6				Galaxy formation
–4.6 109 yr					Formation of Solar System and Earth
		0	3 K		Present

References > see cosmology; early universe.

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Send feedback and suggestions to bombelli at olemiss.edu – Modified 28 nov 2006