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How old is the planet Uranus?

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Quick Answer

The planet Uranus is approximately 4.5 billion years old. All the planets of the solar system formed at about the same time as the protoplanetary disk of dust and gas that surrounded the primordial sun collapsed and collided to form various worlds.

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Full Answer

The solar system formed out of a nebula 4.5 billion years ago. Most of its mass collapsed into the center to form the sun, but the leftover dust and gas began clumping together due to gravity. These clumps smashed into each other over hundreds of millions of years, eventually coalescing into the planets. Uranus, located a chilly 1.7 billion miles away from the Sun, was able to retain many lighter elements, such as hydrogen and helium, and became a gas giant planet.

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