06_Our_Solar_System - Our Solar System The Sun Mercury...

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Unformatted text preview: Our Solar System The Sun Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Asteroid and Comets • Apophis 99942 – Scheduled to pass nearby in 2029 – And again in 2036 • Chance of impact - ~1/100 of a percent • Energy of impact ~900MT Makeup of the Solar System • Sun • Terrestrial Planets • Jovian Planets • Asteroids • Comets Terrestrial Planets • Mercury, Venus, Earth, Mars • Rocky surfaces, metallic interiors. • Few large moons Jovian Planets • Jupiter, Saturn, Uranus, Neptune • Also called Gas Giant Planets • Made up mostly of hydrogen, helium, and hydrogen compounds. • Rings and many moons. Organization of the Solar System Most everything orbits in roughly the same plane and in the same direction, and most everything spins in the same direction it orbits! I said MOST planets rotate in same direction as their orbits around Sun The Fetal Solar System Origin of the Solar System Our theory must explain the data 1. Large bodies in the Solar System have orderly motions. 2. There are two types of planets. – small, rocky terrestrial planets – large, hydrogen-rich Jovian planets 3. Asteroids & comets exist in certain regions of the Solar System 4. There are exceptions to these patterns. Origin of the Solar System Nebular Theory – our Solar System formed from a giant, swirling cloud of gas & dust called the solar nebula. Depends on two principles of Physics: • Law of Gravity gravitaional potential energy ⇒ heat • Conservation of angular momentum and • Basic chemistry Gravitational Collapse • The solar nebular was initially somewhat spherical and a few light years in diameter. – very cold – rotating slightly • It was given a “push” by some event ....
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This note was uploaded on 08/06/2011 for the course AST 2002 taught by Professor Britt during the Spring '08 term at University of Central Florida.

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06_Our_Solar_System - Our Solar System The Sun Mercury...

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