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토플 배경 지식

저작시기 2009.07 |등록일 2009.07.05 한글파일한컴오피스 (hwp) | 16페이지 | 가격 300원

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토플 배경 지식

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Source 9. About Jupiter
<Jupiter`s Satellites>
Source 10. New York`s first subway
<Now I, as Mayor, in the name of the people, declare the subway open!>
Source 11. About Socrates
Source 12. History of Alchemy

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Source 9. About Jupiter
Jupiter is the fifth planet from the Sun and by far the largest. Jupiter is more than twice as massive as all the other planets combined (318 times Earth).
orbit: 778,330,000 km (5.20 AU) from Sun
diameter: 142,984 km (equatorial)
mass: 1.900e27 kg
Jupiter (a.k.a. Jove; Greek Zeus) was the King of the Gods, the ruler of Olympus and the patron of the Roman state. Zeus was the son of Cronus (Saturn).
Jupiter is the fourth brightest object in the sky (after the Sun, the Moon and Venus; at some times Mars is also brighter). It has been known since prehistoric times. Galileo`s discovery, in 1610, of Jupiter`s four large moons Io, Europa, Ganymede and Callisto (now known as the Galilean moons) was the first discovery of a center of motion not apparently centered on the Earth. It was a major point in favor of Copernicus`s heliocentric theory of the motions of the planets; Galileo`s outspoken support of the Copernican theory got him in trouble with the Inquisition.

Jupiter was first visited by Pioneer 10 in 1973 and later by Pioneer 11, Voyager 1, Voyager 2 and Ulysses. The spacecraft Galileo is currently in orbit around Jupiter and will be sending back data for at least the next two years.

The gas planets do not have solid surfaces, their gaseous material simply gets denser with depth (the radii and diameters quoted for the planets are for levels corresponding to a pressure of 1 atmosphere). What we see when looking at these planets is the tops of clouds high in their atmospheres (slightly above the 1 atmosphere level).

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