How old is the Universe?

By Dr. Swapnil Surwase

Age of the Universe means how much time passes since Big Bang.

Astronomers finds two different age of the universe on the basis of study.

Age of the Universe was changed between 1990 to 2021.

From 7 and 20 biilion years to 13.787 billion years.

On the basis on Lambda CDM concordance model Universe age is 13.787 billion years old. 

Wth uncertainty of only 200 million lyears.

During 1993, when Hubble Space Telescope launched that time calculated age is 9 -14 billion years old.

13.787 billion years old is depend on the Hubble constant.

Now universally accepted age of the Universe is 13.787 billion years old.

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