01 01 atm at center 40 k 10 7 atm near edge

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ical differentiation 1000 - 2000 K, 0.01 - 0.1 atm at center 40 K, 10-7 atm near edge • • • Condensation - volatilization followed by condensation, OR Evaporation - partial melting, evaporation, refractory particles remain solid Likely a combination of both… Solar Nebula Solar ! Protosun • • ! Planetesimals • • ! Begins H fusion <100,000 years after condensation Luminosity initially above H-R trend, 25% of mass expelled in intense solar wind (T-Tauri mass (Tphase) Accreting condensates form bodies 10 - 1000 km in diameter Initial flocculation of particles was likely electrostatic, not gravitational, due to charging from solar EM flux Planets • • • Form from the initial set of larger planetesimals that pass a critical size planetesimals that threshold… Begin to sweep up surrounding material… suppress the further growth of competing planetoids Eight major planets Solar Nebula Solar Inner System Outer System Planet Formation ! Planets - formed from accreting planetesimals Planets • Terrestrial planets • Mercury, Venus, Earth, Mars • Comprised chiefly of elements with low vapor pressures • Solid, rocky objects, relatively low volatile contents • Gas Giants (Jovian planets) • Jupiter, Saturn, Uranus, Neptune • Essen...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online