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What did our solar system look like 4.5 billions years ago?

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4.5 billion years ago the solar system looked about the same as it does today. The main differences were as follows: The sun was about 30% less bright than today. That changed gradually over the next 4.5 billion years. Jupiter, Saturn, Uranus, and Neptune have not yet made the final adjustments to their orbits. read more

4.5 billion years ago the solar system looked about the same as it does today. The main differences were as follows: 1. The sun was about 30% less bright than today. read more

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