ASTR 151 Lecture Notes - Lecture 21: Formation And Evolution Of The Solar System, Protostar, Gas Giant
Document Summary
Astr 151- lecture 21- formation of the solar system. Evidence suggest that nearly all the dust inherited from the nebular cloud of gas and dust is vaporized in the collapse to a disk process. As distance away from the sun increases, we see the same building block materials but add new ones the farther out. Things get how when you compress them. The solar nebula had a temperature gradient. Environment must be colder than condensation temperature in order to form that type of solid grain. Condensed materials are what is available to form planets. Condensation sequence: based on the condensation temperature of various materials. More materials to make planets the farther away from the sun. Steps to build planet: condensation of solids. These small planet-like precursors are called planetesimals, they start to attract each other gravitationally when 10-km in size: planetesimals grow very rapidly through accretion as they run into each other.
