The last dozen or so have not yet been given names, just catalog numbers. Not Lo, but Io (eye oh). The first four names were given by Simon Marius, who discovered them independently. His names were preferred over Galileo's, as G wanted to name them for members of the Medici family, which didn't sit well with anyone but the Medicis. Thus the rule that Jupiter's moons were to be named after characters he had love affairs with in mythology (that Ganymede was male just showed Jupiter was, shall we say, ambidextrous). Since the list of names is already here from a previous poster, I'll leave it at that.
2016-03-28 23:57:13
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answer #2
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answered by Anonymous
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I really don't care! Why don't you use the internet... there's this wonderful thing out there called Wikipedia. It could help you! If this is a school project, you really ought to do your own research.
I guess that's too much work. Here's a link for you:
2007-02-17 01:53:09
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answer #3
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answered by pianoman.jeremy 4
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Beyond the rings and small inner satellites are Jupiter’s famous Galilean moons. Galileo discovered these satellites in 1610. These four moons are much larger than Jupiter’s other satellites. They range from the size of Earth’s Moon to the size of the planet Mercury. The closer a moon is to Jupiter, the more dense it tends to be, just as the closer a planet is to the Sun, the more dense it tends to be. Planetary scientists believe that these parallel trends reveal much about how the planets and the solar system formed and evolved over the intervening ages. The innermost satellites, Io and Europa, which orbit Jupiter at 421,000 and 671,000 km (262,000 and 417,000 mi), are dense and rocky like Mercury, Venus, Earth, and Mars, the innermost planets of the solar system. Ganymede and Callisto, at greater distances from Jupiter—1,070,000 and 1,883,000 km (660,000 and 1,117,000 mi)—are composed of lower-density, icy materials. Ganymede is the largest of Jupiter’s moons.
Jupiter’s Moon Ganymede
Jupiter’s Moon Callisto
Jupiter’s Moon Ganymede
This image of Jupiter’s largest moon, Ganymede, was taken by the Galileo spacecraft in 1999. Scientists believe Ganymede’s bright flat surface was probably created by eruptions of icy volcanic material.
Encarta Encyclopedia
REUTERS/NASA
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Jupiter’s Moon Callisto
Callisto is Jupiter's second-largest moon and the outermost of the planet's large moons. Impact craters have been accumulating on Callisto's surface for more than 4 billion years. Bodies strike the moon's surface and punch through Callisto's dark, icy crust to the brighter, slushy material inside.
Encarta Encyclopedia
CORBIS-BETTMANN/NASA
Full Size
Tidal stresses—fluctuations in gravitational forces—repeatedly flex the moons Io and Europa. The resulting expansion and contraction of the moons causes internal friction that heats them up. Both satellites exhibit forms of volcanic activity as a result. Io is dominated by active sulfur volcanism, while Europa is covered with a blanket of water ice that cracks and vents the tidally generated heat. Exobiologists, scientists who study the possibility of life on other planets, speculate that conditions within the ices on Europa might support primitive forms of life. The Galileo spacecraft began orbiting Jupiter in December 1995 and initiated an in-depth examination of the Galilean moons in December 1997. With data sent back from the spacecraft, scientists have determined that Ganymede has its own magnetic field and Callisto has patterns in its surface structures that show the moon has slowly been modified by its environment. Europa has a complex, glacially active surface, and Io is much more volcanically active than originally believed. Galileo continued to gather data into 2003, focusing primarily on Io and Europa, but also engaging in several close passes by Ganymede and Callisto.
C. The Outer Satellites
Prior to 1999, two additional families of small satellites, located in inclined elliptical orbits at large distances from Jupiter, were known. The first family, Leda, Himalia, Lysithea, and Elara, orbit at average distances of about 11 million km (about 6.6 million mi). These satellites, along with the inner and Galilean satellites and Jupiter’s rings, revolve about Jupiter in the same direction that the planet rotates on its axis. The second family, Ananke, Carme, Pasiphae, and Sinope, orbit at average distances of about 21 to 23 million km (about 13 to 14 million mi) and revolve in the opposite direction. Since 1999, 45 more distant small moons have been found, bringing the total number of known satellites to 61. Most of these new members are also in elongated, tilted orbits and are less than 10 kilometers (6 miles) in diameter. The nature of the orbits of the outer moons suggests that they are trapped asteroids or fragments of larger bodies that were broken up by collisions with asteroids or comets.
2007-02-17 16:05:16
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answer #4
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answered by ian f 1
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