For newborn planets, solar systems are naturally baby-proof
(PHYSorg.com Space & Earth)

Numerical simulations by a group of astronomers, led by Mario Flock from the Max Planck Institute for Astronomy, have shown that young planetary systems are naturally `baby-proof`: Physical mechanisms combine to keep young planets in the inner regions from taking a fatal plunge into the star. Similar processes also allow planets to be born close to stars-from pebbles trapped in a region close to the star. The research, which has been published in the journal Astronomy & Astrophysics, explains findings by the Kepler space telescopes that show a large number of super-Earths orbiting their stars very closely, at the edge of the baby-proof region.