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NATS 3-10 - NATS104lecturemar10 1 Currentsolarsystem a...

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NATS 104 lecture mar 10 Formation of the solar system 1. Current solar system a. All planet lie in common orbital plane>: elliptical plane b. So do most asteroids c. Comets do not d. Neither does Pluto e. All planets orbit the sun counter clock-wise, nearly circular f. Most moons also orbit counter clockwise g. The sum and most rotate in a counter clock-wise, rotation nearly perpendicular to ecliptic 2. Exceptions a. Venus rotates clock-wise b. Uranus tilted ~ 90 degrees c. Neptune’s moon tritons orbits clockwise 3. Distribution of planets a. Two types of planets i. Terrestrial 1. Mercury 2. Venus 3. Earth 4. Mars ii. Jovial planets 1. Gas giants a. Jupiter b. Saturn 2. Ice giants a. Uranus b. Neptune 4. Asteroid belt a. Swarm of small, rocky, asteroids rotate around the sun 5. Far-out asteroids a. There are asteroids out past Neptune’s to i. Called kuiper belt objects ii. Some bigger than Pluto iii. Orbit counter close wise b. Some still further away i. These are comets ii. Found in oort could 6. Moons a. Most planted have moons orbiting counterclockwise b. Some large asteroids have moons too c. Earths moon is anomalously large compared to others 7. Main features
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