ASTRO-110 Lecture Notes - Lecture 28: Radionuclide, Radiometric Dating, Solar Wind
9 Oct 2020
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Document Summary
Gravity drew together enough material to form the sum. Process in which solid particles form in gas is called condensation. Hydrogen and helium: never condense in interstellar space. Hydrogen compounds: can solidify into ices at low temperatures. Rock: gaseous at high temperatures, and solidifies at lower temperatures. Metals: gaseous at high temperatures and condense to solids at higher temperatures than rock. Vast majority of the nebula remained gaseous at all times. H compounds condense into ices only beyond the frost line. As particles grew in mass they began to attract each other and became planetesimals. Gravitational encounters tended to alter orbits and could shatter planetesimals (pieces of planets) Jovian planets began as large, icy planesesimals which then captured hydrogen and helium gas from the solar nebula. Added gas made their gravity very strong therefore they accreted so much gas and. Also explains the large moons of jovian planets.
