4Callisto

= ​ The Icy Moon of Jupiter-Callisto =

Jupiter, it's the fifth planet in our solar system and by far the biggest in the solar system. It's as well, the planet with the most moons, which is around 60. Out of the 60 moons 4 are more important than others. They are known as the Galilean Sattelites named Io, Europa, Ganymade, Callisto.

Callisto


It's an icy moon towards the end of the solar system. It's caught in Jupiters gravitational pull, trapped with three other major moons. Callisto is unusal moon. It's crust is actually composed of ice. It is beleived that there is an ocean of salt water under it's crust. This moon surprisingly has no mountains. The surface of the moon is spotted because it is bombarded by asteroids, comets, meteors, etc. Being far away from the sun Callisto is really cold at a freezing temperature of -279 °F. To get more information about Callisto go to these fun websites. [] [] and [|science.nasa.gov/newhome/headlines/ast22oct98_2.html]

Fun Facts

 * Callisto is about as big as Mercury. [[image:JupiterZeus.gif width="169" height="244" align="right" caption="King of Jupiter: Zeus"]]
 * There is a possibility of salt water being under it's crust.
 * It's shell is a big conductor,conducting a electrical current. [[image:images.jpg align="right" caption="The Surface of Callisto"]]
 * Callisto has a diameter of 2,996 miles.
 * It takes Callisto 16.7 days to orbit jupiter.
 * This moon was discovered in 1610 by Galileo, a famous astronomer. media type="custom" key="4601912" align="right" width="60" height="60"
 * This moon was named after a nymph Zues fell in love with.
 * Callisto is the third largest moon in our solar system.
 * It produces it's own magnetic feild.
 * Callisto is mountainless

Bibliography
 * Mass(KG) is 1.08e + 23 [[image:images5.jpg width="165" height="165" align="right" caption="Callisto's Magnetic Field."]]
 * Mass(Earth=1) 1.8072e -02
 * Equatorial Radius(Earth=1) 3.7629e -01
 * Moon Density(gm/cm^3) 1.86
 * Mean Distance from Jupiter(KM) 1,883, 000
 * Rotational Peroid(days) 16.68902 [[image:images2.jpg align="right"]]
 * Orbital Peroid(days) 16.68902
 * Mean Orbital Velocity(km/sec) 8.21
 * Orbital eccentricity 0.007
 * Orbital Inclantation(degrees) 0.281
 * Escape Velocity(km/sec) 2.45
 * Magnitude(VO) 5.65

Callisto, William B. McKinnon, Library of Congress Publication Data, Chicago, 2007 Jupiter the Largest Planet, Issac Asimov, Lothroe, Lee and Sheperd Company, NY, 1973