After watching a show on the Science channel, showing all the planets in our solar system being in a linear orbit at different distances from the sun, I was wondering if we are unique or are all planetary systems like ours?
I hope that is the right term, linear orbit?
I think it’s because the solar system formed from the accretion disk around the sun, which organized itself into a mostly flat disk before the planets formed. It seems to be the accepted model for planetary systems.