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Io (/ 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 known astronomical object in the Solar System.
Surface area Density Gravity [note 3] Type Discovery (R ... Io 85: 77.4 ± 1.9 [dubious – ...
The names of regions on Io use a combination of a name derived from locations in Greek mythology associated with the nymph Io or Dante's Inferno, or from the name of a nearby feature on Io's surface and the descriptor term, regio, Latin for region. Coordinate, diameter, and name source below come from the IAU's Solar System Nomenclature Website.
Io has an extremely thin atmosphere made up mostly of sulfur dioxide (SO 2). [29] If a surface data or collection vessel were to land on Io in the future, it would have to be extremely tough (similar to the tank-like bodies of the Soviet Venera landers) to survive the radiation and magnetic fields that originate from Jupiter. [30]
Volcanism on Io, a moon of Jupiter, is represented by the presence of volcanoes, volcanic pits and lava flows on the surface. Io's volcanic activity was discovered in 1979 by Linda Morabito, an imaging scientist working on Voyager 1. [1] Observations of Io by passing spacecraft and Earth-based astronomers have revealed more than 150 active ...
Map of the surface of Io, based on images from the Galileo and Voyager missions.. Mountains are widely distributed across the surface of Io.There are about 115 named mountains; the average length is 157 km (98 mi) and the average height is 6,300 m (20,700 ft).
Other observations suggested that Io had a surface dominated by evaporites composed of sodium salts and sulfur. [40] This was consistent with Io lacking water ice either on its surface or in its interior, in contrast with the other Galilean satellites. An absorption band near 560 nm was identified with the radiation-damaged form of the mineral ...
Pages in category "Surface features of Io (moon)" The following 19 pages are in this category, out of 19 total. This list may not reflect recent changes. *