How Old Is The Solar System?

Humans have tried to determine the age of the Earth for as long as we have been human.

It wasn’t until the 1800s that scientists finally began to see just how old Earth really was

In 1862, the physicist William Thomas became one of the first scientists to calculate a fixed age for the Earth

. He calculated that the Earth was between 20-million and 400-million years old.

John Perry was the first scientist to predict that the Earth was billions of years old correctly. 

 The Sun formed 4.5-billion years ago, and planet formation began immediately.

 Eight planets coalesced out of the gas and dust in orbit around the Sun.

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