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Lecture 9

Astronomy 2232F/G Lecture 9: Week 5 - Jupiter

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Astronomy 2232F/G
Gordon Osinski

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Jupiter • 5th planet from the Sun • More massive than all the planets combined • Gas-giant planet – not solid • Primarily composed of H and He • Comet Shoemaker – Levy 9 collided with Jupiter Comet Shoemaker - Levy 9 • Comet got too close to Jupiter and broke up into pieces because of Jupiter’s gravity • 21 impact events over 6 days on Jupiter • Because Jupiter’s atmosphere is so active, scars of impact over time disappeared History Discovery – known by the Ancients Roman mythology – king of the gods, most important deity, Greek counterpart: Zeus Jovian satellites named after Jupiter’s lovers and descendants Exploration Pioneer 10 and 11 (1972/73) • 1st spacecraft to flyby Jupiter • On trajectories to leave Solar System • Final contact 2003 and 1995 Voyager 1 and 2 (1977) • Goals: flyby/explore magnetosphere and moons • Discovered rings – all gas giants have rings • On trajectoris to leave Solar System Galileo (1989-2003) • Goals: study Jupiter and moons • Deliberately plunged into Jupiter Juno (en route) • Launch: Aug.5, 2011 • Solar powered space craft • Goals: study formation of Jupiter • Arrival: July 2016 Fact Sheet
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