What happened before the Big Bang?
Fermilab・2 minutes read
The universe's origin, starting around 13.8 billion years ago, remains a mystery despite scientific theories and evidence such as the cosmic microwave background radiation. Speculations about the universe's beginning include eternal inflation, extra dimensions, and a super-compact state transitioning into expansion.
Insights
- The universe's origin, around 13.8 billion years ago, involved a hot, dense state that has since expanded, leaving behind the cosmic microwave background radiation (CMB) as a crucial remnant.
- Speculations about the universe's earliest moments involve concepts like eternal inflation and phase transitions, with physics failing to explain conditions before ten to the minus thirteen seconds, highlighting the mystery surrounding the universe's beginnings.
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Recent questions
How old is the universe?
Approximately 13.8 billion years old
What is the cosmic microwave background radiation?
Earliest observable remnant of the universe's beginning
How hot was the universe at the cosmic microwave background observation?
Around 2,700 degrees centigrade
What is the inflation period in the universe's history?
Period of rapid expansion faster than light
What are some speculations about the universe's beginning?
Eternal inflation, additional dimensions, super-compact state