Io (moon) - Wikipedia
WEBIo (/ ˈ aɪ. oʊ /), or Jupiter I, is the innermost and second-smallest of the four Galilean moons of the planet Jupiter. Slightly larger than Earth 's moon , Io is the fourth-largest moon in the Solar System , has the highest density of any moon, the strongest surface gravity of any moon, and the lowest amount of water by atomic ratio of any ...
Galilean moons - Wikipedia
WEBIo (Jupiter I) is the innermost of the four Galilean moons of Jupiter; with a diameter of 3642 kilometers, it is the fourth-largest moon in the Solar System, and is only marginally larger than Earth's moon.
Io Facts - Science@NASA
WEBIo is the most volcanically active world in the solar system. Io was discovered on Jan. 8, 1610, by Galileo Galilei, along with Jupiter's three other largest moons: Europa, Ganymede. and Callisto.
Io, Jupiter’s chaotic volcano moon | The Planetary Society
WEBIo is the innermost and third-largest of Jupiter’s four Galilean moons. Io is covered in hundreds of volcanoes. It is the most volcanically active world in the Solar System. Io can help us understand volcanism and tidal heating throughout the Solar System.
What are Jupiter’s Galilean moons? | The Planetary Society
WEBDec 26, 2023 · Io is the innermost of the four Galilean moons, orbiting closest to Jupiter. Next out is Europa, then Ganymede, and then Callisto. Jupiter is the most massive object in the Solar System other than the Sun itself, and has a very strong gravitational pull.
Io Moon Facts - Space Facts
WEBIo is the innermost and the second smallest of the four Galilean moons. It was discovered, along with Europa, Ganymede and Callisto by Galileo Galilei in 1610. Io Diagrams. Io size compared to the Moon and Earth. Jupiter’s Galilean moons size comparison (Io, Europa, Ganymede and Callisto) Facts about Io.
Exploration of Io - Wikipedia
WEBThe exploration of Io, Jupiter's innermost Galilean and third-largest moon, began with its discovery in 1610 and continues today with Earth-based observations and visits by spacecraft to the Jupiter system.
Io | Surface, Volcanoes, & Facts | Britannica
WEBSep 22, 2024 · Io, innermost of the four large moons (Galilean satellites) discovered around Jupiter by the Italian astronomer Galileo in 1610. It is the most volcanically active body in the solar system. As many as 300 volcanoes may be active on the satellite at a given time.
Jupiter's Moon Io has been Volcanically Active for Billions of Years
WEBApr 18, 2024 · A new study presents measurements of Io's volcanic gasses that indicate Jupiter's moons Io, Europa, and Ganymede have been locked into a specific orbital resonance for nearly their entire existence.
This is our best look yet at Io, the solar system's most volcanic …
WEBJul 18, 2019 · Io is one of the four so-called Galilean moons of Jupiter, along with Europa, Ganymede, and Callisto. These larger moons, discovered by Galileo Galilei in 1610, are all visible from Earth...