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This 1 page Class Notes was uploaded by Lindsey Kangas on Monday October 3, 2016. The Class Notes belongs to 10273 at Texas Christian University taught by Dr. Ingram in Fall 2016. Since its upload, it has received 3 views. For similar materials see Intro Astronomy: Earth&Planets in PHYSICS (PHY) at Texas Christian University.
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Date Created: 10/03/16
Notes 10/3 Solar Nebular Hypothesis Planets form out of the same cloud of gas and dust as the sun; simultaneously 1. Slowly spinning cloud of gas and dust begins to collapse a. We do not know what caused collapse—possibly a shockwave 2. As it collapses, a. Density of the cloud increases (m/v=d) b. Temperature of the cloud increases (energy conservation: as the cloud shrinks, gravitational energy turns into heat) 3. Cloud flattens into a disk a. As the cloud is spinning, centrifugal force pushes out (as gravity is pushing in) 4. Condensation as the disk cools a. Solid matter condenses out of the gas i. Most to least common: gas, ice, rock, metal b. Inner part of the disk is hot—metal and rock will condense c. Outer part is cold—ice will condense 5. Accumulation a. Small condensed particles collide and grow into bigger objects b. We do not know how to goes from a ping-pong sized ball to 100 km long 6. After objects grow (somehow) to 100 km+ in size gravity-assisted growth Why is Jupiter more massive than Earth? Jupiter has a larger feeding zone (25X bigger) o More space to draw materials from Ice advantages: o Ice is sticky o It is more abundant (2X more than rock and metal combined) Ability to capture and hold H and He because it is cold (98% abundant)
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