The Moon IO

By: Rachel Meyer

Information About IO

IO most volcanically active planet Jupiter. Temp Io 260 degrees fahrenheit (-160 degrees celsius). 2264 miles (3642 kilometers) away Jupiter. 5% wider than Earth.
Orbits 1.77 days. 4.5 billion years old. Closer Jupiter. No impact craters though it's rocky / solid surfaces. IO same size (3643 km across) / density (3.53X water) as the Moon. Most geologically active moon in solar system. Every four orbits Io, Europa orbits twice / Ganymede orbits once. Io cannot keep one side exactly facing Jupiter / varying strengths of tides because of its elliptical orbit, Io stretched / twisted over short time periods. IO fifth moon.

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Lava temp 3100 degrees fahrenheit (1700degrees celsius). More than 200 volcanoes. Volcanoes IO produce largest visible object solar system.IO has lava lakes / floodplains liquid rock. Produces 100 times lava. NASA Voyager discover volcanoes, 1979.

Who Discovered IO

Galileo, Italian astronomer discovered the moon IO.
Discovered 1610. Was born Pisa Italy, February 15, 1564. Discovered moon day prior, could not differentiate between IO / Europa. Galileo named this moon Jupiter 1. Mid 1800s, renamed IO. Pioneer 10 first arrived, 1973.

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Interior IO composed of iron or iron sulfide core. Brown silicate outer layer. Gives planet orange, yellow, black, red / white appearance. IO formed region around Jupiter where water ice plentiful. IO heat, combines possibility water on IO shortly formed. Distinctive feature volcanoes. Atmosphere sulphur dioxide. . Io’s orbit cuts across Jupiter’s powerful magnetic lines force, Io into an electric generator.