"Continue to surprise those who would put you in a neat demographic. Be insistently curious." -Gordon Gee
Twenty years ago, our Solar System was the only one we knew of that we were certain had planets orbiting around a main-sequence star.
A terrestrial planet hovering between Mars and Jupiter would be able to push Earth out of the solar system and wipe out life on this planet, according to a UC Riverside experiment. UCR astrophysicist Stephen Kane explained that his experiment was.