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Jupiter – 5.2 AU. Voyager. Atmosphere - Almost all atmosphere - 86% H, 13.6 %He, Methane, Ammonia, Water Vapor - Belts and Zones. Atmosphere - Almost all atmosphere - 86% H, 13.6 %He, Methane, Ammonia, Water Vapor - Belts and Zones - Brown and White Ovals. Atmosphere

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Atmosphere

- Almost all atmosphere

- 86% H, 13.6 %He, Methane,

Ammonia, Water Vapor

- Belts and Zones


Atmosphere

- Almost all atmosphere

- 86% H, 13.6 %He, Methane,

Ammonia, Water Vapor

- Belts and Zones

- Brown and White Ovals


Atmosphere

- Almost all atmosphere

- 86% H, 13.6 %He, Methane,

Ammonia, Water Vapor

- Belts and Zones

- Brown and White Ovals

- The Great Red Spot

(high pressure “hurricane”)


GRS

Earth



Jupiter’s Magnetic Field

- 19,000 times stronger than Earth’s

- Caused by rapid rotation and liquid metallic H-layer





Jupiter’s Moons

- At least 60 moons

- Most very small (100’s of km)

- 4 largest known as the “Galilean Moons”


The Galilean Moons

Io

Europa

Callisto

Ganymede


Io - volcanically active

Jupiter

Io

Europa


Io with new debris from

Tvashtar Catena




Europa –

A subsurface ocean







Ganymede - 2 types of Surface

1. Young, light color



Ganymede - 2 types of Surface

1. Young, light color

2. Old, dark, heavily cratered

A weak magnetic field

=> A deep sub-surface ocean?


Voyager - 1979

Galileo - 1999


Callisto- An old, battered surface

Another moon with a magnetic field



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