DiscussionsCategory: PhysicsHow do physicists determine the age of the universe?
Fayo OlaFayo Ola asked 4 years ago

How do physicists know how old the universe is? They say it is about 13 billion years old, but how are they able to know this when they were not there when the universe was created?

Oladipupo AdegbiteOladipupo Adegbite replied 4 years ago

That is a good question 🤔.

According to research. Astromers can determine the age of the universe by studying the oldest object within the universe and measuring how fast it is expanding.

Oladipupo AdegbiteOladipupo Adegbite replied 4 years ago

But they don’t actually know the age universe is .

Chris UgenyiChris Ugenyi replied 4 years ago

how do they know the age of the oldest object

Abdullahi AbubakarAbdullahi Abubakar replied 2 years ago

Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall.

dave dannidave danni replied 8 months ago

how sure are they

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