AST101H1 Lecture Notes - Lecture 12: Oort Cloud, Small Solar System Body, Kuiper Belt

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

Document Summary

Ast101 lecture 12 formation of the solar system. Doppler effect for light: a small effect for light: light sources moving away from you appear redder = longer wavelengths, light sources moving toward you appear bluer = shorter wavelengths. Real spectra: a spectrum of a galaxy consists of, emission and absorption lines indicating presence of many elements, continuum spectrum indicating the presence of billions of stars in the galaxy. The origin of the solar system: any theory must support the following conditions, all objects, including moons and small solar system bodies, must spin and orbit in the same direction on the same flat plane. The nebular hypothesis: proposed in the 1700s by philosopher immanuel kant and mathematician pierre- Supernova explosion leave behind expanding remnants when stars die and dissipate. The shockwave from a dying star triggers the solar nebula to collapse and the unstable gravity continues to pull the cloud of gas inwards.