Sentences with phrase «planetesimals close»
Not exact matches
But at the same time, Mars is nudged outward by trillions of close encounters with planetesimals that give infinitesimal gravitational kicks to the growing Mars without hitting it.
http://www.sciencemag.org/
When the embryo reaches about where Mars now orbits, its growth by planetesimal accretion slows, but the other embryos have been left behind, closer to the sun.