Io is the innermost of Jupiter's four Galilean moons and the most volcanically active body known in the solar system, its hundreds of active volcanoes driven by tidal heating from Jupiter's gravity and the gravitational pull of neighboring moons Europa and Ganymede.
Facts
Diameter (km) Discovery Year Connections
Associated With
Source Wikipedia: Europa (moon)
Orbits
Source NASA Solar System Exploration
Sources
1. NASA Solar System Exploration
National Aeronautics and Space Administrationscience.nasa.gov, Jupiter Moons: Io
Io is caught in a tug-of-war between Jupiter's massive gravity and the smaller but precisely timed pulls from two neighboring moons that orbit farther from Jupiter, Europa and Ganymede.
science.nasa.gov, Jupiter's Galilean Moons
They are called the Galilean satellites after Italian astronomer Galileo Galilei, who is credited with their discovery in 1610.
Entity description, io catalogue classification
Io is the innermost of Jupiter's four Galilean moons and the most volcanically active body known in the solar system, its hundreds of active volcanoes driven by tidal heating from Jupiter's gravity and the gravitational pull of neighboring moons Europa and Ganymede.
View the Source Wikipedia: Io (moon)
In Group: Moons of Jupiter, Lead sentenceQuote, In Group: Moons of Jupiter, Lead sentence
Io () is the innermost and second smallest of the four Galilean moons of Jupiter.
Wikipedia: Europa (moon)
Associated With: Europa, Orbit and rotation sectionQuote, Associated With: Europa, Orbit and rotation section
The orbital eccentricity of Europa is continuously pumped by its mean-motion resonance with Io.
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