GSU ASTR 1010 - Jupiter (3 pages)

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Jupiter



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ASTR 1010 1st Edition Lecture 20 Outline of Last Lecture I Mars A Properties Outline of Current Lecture I Jupiter A Atmosphere B Properties C Magnetic Properties D Internal Structure E Satellites Current Lecture I Jupiter A Atmosphere H He Methane and Ammonia Horizontal bands in the atmosphere alternating reddish light colored bands reddish color due to Ammonia Great red spot large high pressure storm 16 000 x 36 000 miles permanent feature Rotational period Differential Rotation a 9 hrs 50 min b 9 hrs 56 min Radiates more energy than it receives from the sun due to slow contraction of planet B Properties Orbital Period 11 86 years Rotational Period 9 hrs 56min Tilt of Axis of Rotation 3 degrees Mass 318 M Earth Radius 11 2 R Earth Ring system detected by Voyager C Magnetic Properties Mag Field 100 x Mag field of Earth Tilt of Mag Axis 9 6 degrees Strongest planetary magnetic field in Solar System Most extensive radiation belts Radio emissions from Radial belts modulated by Jovian longitude and the position of Io D Internal Structure Core tiny amount of real metals Not enough to generate string mag field Metallic Hydrogen Molecular Hydrogen Mush thick soupy Hydrogen Helium atmosphere E Galilean Satellites Io innermost 1 5 x the size of Earth s moon a Surface covered with active volcanoes the largest is Prometheus Sulfur lies in Io s orbit b Geological activity produced by the tidal forces of Jupiter causes active volcanoes flexing of crust generates thermal energy c Provides controlling influence on the radio emissions from Jupiter s radiation belts Europa Surface covered with network of lines and cracks and clear fields of ice Probably the result of icy volcanism May contain water beneath the surface Possibility of life Ganymede Largest moon in the solar system many impact craters and a weak magnetosphere Tenuous but permanent atmosphere Calisto Highly cratered surface largest crater is Valhalla is surrounded by concentric shock rings


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