Did a 5th Giant Planet Mess up the Orbits of Jupiter, Saturn, Uranus and Neptune? - Universe Today

The solar system’s current planetary orbits seem stable, but that’s only because the planets have settled into them over billions of years.  The early solar system was a much different place than that seen today, and for almost 20 years, scientists thought th…

The solar systems current planetary orbits seem stable, but thats only because the planets have settled into them over billions of years.  The early solar system was a much different place than that … [+3821 chars]

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