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Lecture 18

ASTRONOMY LECTURE 18

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Department
Astronomy
Course
ASTR 100
Professor
Govindrajan
Semester
Fall

Description
ASTRONOMY LECTURE 18 10/7/13 GAS GIANTS: JUPITER 1. General Properties of Gas Giants (Jovian) a. More massive than Earth b. No surface to stand on­ no solid surface c. Many moons d. Significant Magnetic fields e. Less dense f. All Have Rings g. Exoplanet Similarities h. Over 800 Examples have been discovered i. Jupiter, Saturn, Uranus, Neptune 2. Space Probes to the Outer Planets a. Pioneer 10 1973­1979 b. Pioneer 11 1974­1989 c. Voyager 1 1979­1980 d. Voyager 2 1979­1989 e. Galileo –Jupiter 1995­2003 f. Cassini­ Saturn 04­present i. Voyager and pioneer both went on tour of the solar system ii. Solar system was lined up perfectly for one satellite to view all the  gas giants 3. Jupiter General Properties a. Mass 318 * Earth th i. 1/10  of the sun b. Diameter 11.2 * Earth c. Mean Density = 1330 kg^3 d. Albedo = .52 e. Magnetic Field 14 * Earth’s f. Day = 9 hour 50 m g. Axis tilt – 3 degrees h. 63 moons 4. Mass of Solar system i. Sun has 99.8% of all mass in solar system ii. Jupiter has .1% iii. Rest is the other .1% iv. Comets v. All other planets
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