21. giant planets - institute for astronomybarnes/ast241_f15/gp/gp1.pdf · -100 cold enough for...
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12 hours on Jupiter
Surface Appearance
Surface Appearance: Belts
Convection and rapid rotation organize atmospheric motion.
Belts: sinking gas exposes red NH4SH clouds; circulates faster.
Zones: rising gas forms white NH3 clouds;
circulates slower.
Jupiter Unpeeled
Surface Appearance: Circulation Patterns
Approaching Jupiter
Surface Appearance: Great Red Spot
Outward AppearanceSurface Appearance: Great Red Spot
Jupiter's Great Red Spot Region
H
Surface Appearance: Saturn
Saturn … Four Years On
Bands like Jupiter’s, but less dramatic since atmosphere is deeper due to weaker gravity.
Surface Appearance: Uranus & Neptune
Their atmospheres are deep, methane-rich, and very cold.
• Cloud layers are too deep to be easily seen.
• Methane (CH4) absorbs red light, transmits blue.
— blue planets with subtle cloud features.