UT Arlington ASTR 1345 - Space Missions and Jupiter (2 pages)

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Space Missions and Jupiter

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Space Missions and Jupiter


Talks about Mars' moons, the different space missions to Saturn and Jupiter.

Lecture number:
Lecture Note
University of Texas at Arlington
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ASTR 1345 1st Edition Lecture 21 Outline of Last Lecture I Mercury A Caloris Basin II Venus III Mars Outline of Current Lecture I Mars Moons II Voyager Missions III Galileo Mission IV Cassini Mission V Jupiter A Jupiter s Interior B Jupiter s Atmosphere C Jupiter s Aurora Current Lecture l Mars has 2 small moons named Phobos and Deimos discovered in 1877 by Asaph Hall Phobos is potato shaped and its period of 5 hours means it orbits faster than Mars rotates so it moves west to east across the sky It is now believed that this moon is more like a pile of rubble Deimos moves from east to west across the sky in about 3 Earth days ll Voyager 1 and 2 each reached Jupiter in 1979 Saturn gave Voyager 1 a gravitational slingshot out of the Solar System Voyager 2 used Saturn s gravity to propel it closer to Neptune 1986 and Uranus 1989 In 2008 after 31 years of travel both Voyagers crossed different parts of the solar system boundary known as the termination shock 90 AU from the Sun lll Galileo made 3 passes through the inner solar system before reaching Jupiter in 1995 Galileo went through Jupiter s moon system discovering large saltwater ocean under Europa s icy crust These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute lV Cassini reached Saturn in 2004 later sending out a probe into the atmosphere of Titan Saturn s largest moon V Jupiter s AU is 5 2 sidereal period is 11 88 Earth years Rotation period is just under 10 hrs 5 min shorter at equator than at the poles Tilt of rotation is 3 degrees cloud top temp is 150K 190 degrees F It has 62 moons A The core of Jupiter is solid rock containing iron and silicon and gets about 25 000K because of high pressure The mantle consists of hydrogen at pressures to make it a liquid metal Excellent conductor of electricity creating magnetic field at cloud level B Jupiter s clouds take their red white brown and blue colors from sulfur phosphorus and other impurities in the atmosphere Lowest layers of Jupiter s atmosphere contain Hydrogen Helium methane ammonia and water Because of Jupiter s fast rotation its clouds are in constant motion confined to narrow jet streams White ovals are higher and cooler and brown ovals are lower and warmer Jupiter s Great Red Spot is the size of 2 Earths and the largest storm in solar system

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