ay101 lecture notes 10/4
ay101 lecture notes 10/4 AY 101
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This 2 page Class Notes was uploaded by Abby Kunis on Tuesday October 4, 2016. The Class Notes belongs to AY 101 at University of Alabama - Tuscaloosa taught by Jeremy Bailin in Spring2015. Since its upload, it has received 11 views. For similar materials see AY 101 - Intro to Astronomy - Jeremy Bailin in Astronomy at University of Alabama - Tuscaloosa.
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Date Created: 10/04/16
Ay101 lecture notes 10/4/2016 Asteroid and Kuiper Belts: leftovers Asteroids: - mainly rock/metal like terrestrial worlds - spaced far apart (70 km between neighbors) Pluto and Charon: - new horizons spacecraft ﬂew past July, data from ﬂyby slowly coming in (will be for years) - Universal expectation: too small, too little tidal forces to keep insides molten. Ought to be dead worlds covered in craters. Comets: - sometimes outer solar system objects get perturbed into orbits that approach the sun - when we measure their orbits, most go out to either… 50-100 AU (Kuiper belt) or about 100,000 AU (oort cloud) - tails formed by gases that sublimate off the nucleus, small dirt grains that come out. - pushed away from the sun by solar wind. Meteor showers: - if earth passes through the former path of a comet, the dirt grains burn up in our atmosphere. - Best meteor showers: August 12th (Persieds; comet swift-tuttle), November 17th (Leonids; comet tempel-tuttle) Formation of the Solar System: ~Key observations: -terrestrial vs. jovian planets -ﬂat plane with mostly circular orbits -most orbits and rotation are in the same direction Protosolar Nebula: - collapsing very- slowly-spinning gas cloud ~turns gravitational potential energy into thermal energy (Heats Up) ~ conserves angular momentum as it gets smaller (spins up and ﬂattens) Ay101 lecture notes 10/4/2016 Condensation: - small solid planetesimals congregate together to form larger objects. Rocky vs. Icy Speeds: - within the frost line- ~ just rock and metal which, don't stick well. - outside the frost line- ~ rock, metal + ice (more material), ice is stickier (snowballs) - larger planetary cores can be formed outside the frost line.
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