The Big Bang
The origin of everything: 13.8 billion years ago, all space, time, matter and energy began in a single event
Key Facts
- 1
Universe began 13.8 billion years ago from an infinitely dense, hot singularity โ supported by CMB radiation and galaxy expansion
- 2
Cosmic Microwave Background (CMB): faint afterglow of the Big Bang detected in 1965 by Penzias and Wilson (Nobel 1978)
- 3
JWST can see galaxies from just 300 million years after the Big Bang; Hubble measured the universe's expansion rate
๐ Did you know? "Big Bang" was mockingly coined by Fred Hoyle in 1949 as an insult to the theory โ and the name stuck
Quick Reference
Category
Space Milestones
Region
๐ Universe
Year / Era
13.8 Billion Years Ago
About
The origin of everything: 13.8 billion years ago, all space, time, matter and energy began in a single event