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This set a minimum age for the Earth, but thanks to geologic processes like weathering and plate tectonics, it could still be older.Meteorites as the Final Answer to the Age of the Earth The problem with measuring the age of rocks on Earth is that the planet is under constant geological change.Scientists assume that all the material in the Solar System formed at the same time.
Clever scientists discovered features about the Earth and the Sun that change over time, and then calculated how old the planet Earth is from that.
At some point in the early history of Earth, a planetoid the size of Mars crashed into our planet.
The resulting collision sent debris into orbit that eventually became the Moon.
How do scientists know Earth is 4.54 billion years old?
It’s actually difficult to tell from the surface of the planet alone, since plate tectonics constantly reshape its surface.
Scientists think that the Earth is 4.54 billion years old.