three theories of planet formation busted this is in response to the statement explanation including the nearly circular and coplanar orbits of the planets yet the article via national geographic clearly points to newly discovered star systems defy existing models of how planets form and theory has struck out and theory has implications not born out in reality the nebular hypothesis is falsified theory because it does not represent reality i cannot see that being any clearer why is it not mentioned that exoplanets falsify this theory hypothesis this has been known for over years now as the article was written feb