A 2005 Nature publication detailed a computer simulation of early solar system evolution, known as the Nice model. The Nice model posits initial closer orbital proximities for the outer planets ...

If you want to make a solar system like ours -- with a central star, rocky planets and gas giants -- all you need is to begin with a cloud of molecular gas that's cool enough and dense enough to ...

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 ...