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lecture_20 - G i a n t P l a n e t s • Mass radius...

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Unformatted text preview: G i a n t P l a n e t s • Mass, radius, rotation rate and atmosphere are significantly larger than Earth’s. • Overall compositions similar to Sun’s except that heavy elements are 5–10 times more abundant: 60–70% H, 25–30% He, 5–15% C, N, O, Si, S, Fe, etc. • Gaseous envelope and atmosphere, metallic H interior, ice and rock core. • Surface temperatures around 100 K; Core temperatures above 10,000 K • Violent winds correlate with observed belts and zones. • Long-lived storm systems ( e.g. , Great Red Spot) are common. Produced by heat rising from below by convection. • Leakage of more internal heat than gained from solar heating. • Jupiter has intense magnetic field, probably due to large interior region of metallic H. • Violent winds and lack of a solid surface make possibility of life bleak. Lattimer, AST 248, Lecture 20 – p.1/12 J u p i t e r Lattimer, AST 248, Lecture 20 – p.2/12 J u p i t e r ’ s G a l i l e a n S a t e l l i t e s Name Diameter Mass Period (% Moon) (% Moon) (days)...
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