AST101H1 Lecture Notes - Lecture 16: Kuiper Belt, Oort Cloud, Metallic Hydrogen

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Michael Reid

Document Summary

All the planets & most satellites rotate on a circular pattern in nearly the same plane in the same direction. Distance from the sun = 5. 20 au. Asteroids in the asteroid belt, kuiper belt, oort cloud. Three exceptions: planets with abnormal axis, unusual orbits, unusually large moons. A: 98% h & he, 2% everything else. Only rocks and metals condense (outside frost line) Accretion of plentessimals small rocks, turn to small rocks, turn to planets. Forming the solar system pg 235: a large solar nebula contracts due to gravity, contraction of the soalr system: as it contracts, the cloud heats, flattens, and spins faster, becoming a spinning disk of dust and gas. The sun will be born in the centre. 3, condensation of solid particles: h + he remain gaseous, but other materials can con- dense into solid seeds for building planets. Warm temperature allow only metal/rock seeds to condense in inner solar sys- tem.