⏰ when
When was the first estimate of the age of the universe made?
Quick Answer
Modern estimates began in the 20th century, with Hubble-era work in the 1920s and later refinements leading to today’s value of about 13.8 billion years.
The Full Story
The first serious scientific estimates of the universe’s age came after astronomers realized it was expanding. Early calculations in the 20th century used the expansion rate to infer how long the universe had been growing. Those values were initially off, but the method was foundational. Today, measurements from the cosmic microwave background and other data give an age of about 13.8 billion years.
Key Facts
1.Early estimates began in the 20th century
2.Modern age is about 13.8 billion years
3.Based on expansion and CMB data
YouTube Angle
Suggested video title for this topic:
"How scientists figured out how old the universe really is."
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