Why is Earth’s axis tilted?

No one knows for sure why the Earth’s axis is tilted, but many theorize that it was the result of a collision with a large planetoid during the last stages of Earth’s formation over 4.5 billion years ago.

The theory is that the impact with this small, rocky planet not only knocked Earth to a tilt but also tore away a chunk of Earth, forming the moon.

Time and spinning smoothed Earth’s and the moon’s surfaces back into a sphere. Or so the theory goes.

why is earths axis tilted

Regardless, this tilt gives Earth the seasonal variations necessary to support the variety of life—from plants to animals.

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist for zippyfacts.com. Born in New York, she loves interesting random facts from all over the world.