The closer the moon is to the planet the larger the

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Unformatted text preview: is nearest Jupiter. 19 Tidal forces are due to variation in the strength of gravity acting on a object from one side to the other (e.g., near side to far side). The arrows in the diagram indicate the strength of gravity from the planet on the near and far sides of the moon. A moon experiences variable amounts of tides because of its elliptical orbit. The closer the moon is to the planet, the larger the tidal bulges. The changing size of the tidal bulge produces frictional heating inside of the moon. This basic mechanism powers the geological activity of the Jovian moons. The farther the moon is from the planet, the less tidal heating in experiences. Io is the closest Galilean satellite to Jupiter, so it has the greatest tidal heating and is the most geologically active moon. Europa’s Icy Surface Images: NASA/JPL/DLR Europa’s icy surface is criss-crossed with ridges 20 The bright white and bluish part of Europa's surface is composed mostly of water ice, with very few non-ice materials. Dark brown areas represent rocky material from the i...
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This note was uploaded on 10/23/2013 for the course ASTR 100 taught by Professor Dunne during the Fall '12 term at University of Illinois, Urbana Champaign.

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