TimeLines at: HistoryOfTheUniverse.com/tl1.html
Science > Universe
- Universe is 13.7 Bya +/- 2% old
- THe first elements Hydrogen, Helium and Lithium are formed from 240,000 - 300,000 years after the big bang.
- The cosmic microwave background (CMB) radiation is created about 380,000 years after the big bang.
- Early active galaxies, and population III stars started to form 300 - 500 million years after the big bang.
- Heavier elements were created sometime after 500 million years by massive stars and supernovas.
The Inflationary Universe", 1997, Alan Guth