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Planetary Ring Systems

Explore the intriguing history of planetary ring systems, beginning with Galileo's first observations of Saturn's rings in 1610, which baffled him as they mysteriously vanished and reappeared. Discover Christiaan Huygens’ pivotal suggestion in 1655 that Saturn was encircled by rings, followed by Giovanni Cassini's discovery of gaps in the rings. Transition to modern understanding in the 1970s and 1980s, which revealed rings around gas giants like Jupiter, Uranus, and Neptune. Uncover how gravitational forces, collisions, and shepherd moons shape these captivating structures.

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Planetary Ring Systems

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  1. Planetary Ring Systems Brenton C. Davis Tuesday, April 20th 2010

  2. The History of the Rings • In 1610 Galileo Galilei first observed, but was unable to identify Saturn’s Rings • To further mystify Galileo, the rings “disappeared” in 1612 and “reappeared” in 1613 • Long ago, Sauron created the One…

  3. A New Ringbearer • It wasn’t until 1655 that Christiaan Huygens suggested that Saturn was surrounded by a ring. • Robert Hooke added to this observation by the notation of shadow’s on the rings.

  4. Coming to the Present • In 1675, Giovanni Cassini discovers gaps in a system of concentric rings • Pierre-Simon Laplace suggested, in 1787, that these ringlets were solid • However, through the careful application of Newton’s Law of Universal Gravitation, James Maxwell was able to prove they must be composed of numerous small particles

  5. The Present Model

  6. There are more rings? • In the 1970’s and the 1980’s rings were discovered around the other three gas giants • The Neptune and Uranus’ rings were detected indirectly. • Jupiter was observed by the Voyager 1 Space Probe

  7. Planetary Ring Formation • Collisions • Keplerian Shear • Shepherd Moons • Orbital Resonances

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