the planets in our solar system. * * * * * *
TRANSCRIPT
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The planets in our Solar System
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Spacecraft Observations of Jupiter
• Pioneer 10 flew by Jupiter on December 1, 1973. • Pioneer 11 flew by Jupiter on December 1, 1974. • Voyager 1 flew by Jupiter on March 5, 1979.• Voyager 2 flew by Jupiter on July 9, 1979.• Ulysses, studies the poles of the Sun. Jupiter flyby
February 8, 1992. • Galileo Orbiter/Atmospheric Probe - 1995 – 2003.• Hubble Space Telescope - observations since April
25, 1990.• Cassini – en route to Saturn, December 2000, and
now there.
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Voyager Spacecraft
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Galileo Mission to
Jupiter and its moons
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The Voyager Spacecraft on
its way, looking back at Earth and
our Moon
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Galileo atmospheric probe of Jupiter’s atmosphere - December 7th, 1995
Depth of measurements ~200 km
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Jupiter, with its dark belts (where gases move down into the interior), and light zones
(where gases move upwards). Also
visible is the Great Red Spot, a huge
hurricane that has been observed from
Earth for ~ 350 years, and other
more or less temporary surface
features
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Jupiter’s Cloud Structure
1
2
3
4
5
Red Spot
180 km
120 - 110 km
90 km
70 - 80 km
30 km
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-143 C -18 C 127 C
o o o
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Some features in Jupiter’s dynamic atmosphere change just like weather on Earth. The 2 images are 10 hours apart.
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Winds at top of atmosphere – travel in opposite directions at different latitudes
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Observed circulation of Jupiter’s Red Spot
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Jupiter’s Red Spot is a 350 year old hurrican!
Nighttime image showing lightning in Jupiter’s
atmosphere
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Other storms (“small spots”) in Jupiter’s atmosphere
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Ring around Jupiter,
discovered by the Voyager Spacecraft
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Ring system – made of fragments of ice
182,000 km
Moons inside ring system
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Internal structure
of Jupiter
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Strength of the magnetic fields of the planets. Jupiter has by far the strongest magnetic field, because its interior is made of
an excellent electric conductor (liquid metallic hydrogen), and because the planet rotates around its axis faster than any other (once in 10 hours).
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Aurora at poles of Jupiter – show that Jupiter has a strong magnetic field
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Jupiter summary