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Io is slightly larger than Earth's Moon. It has a mean radius of 1,821.3 km (1,131.7 mi) (about 5% greater than the Moon's) and a mass of 8.9319×10 kg (about 21% greater than the Moon's). It is a slight ellipsoid in shape, with its longest axis directed toward Jupiter. Among the Galilean satellites, in both mass and volume, … See more
Io , 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 … See more
Io orbits Jupiter at a distance of 421,700 km (262,000 mi) from Jupiter's center and 350,000 km (217,000 mi) from its cloudtops. It is the … See more
Io has an extremely thin atmosphere consisting mainly of sulfur dioxide (SO 2), with minor constituents including sulfur monoxide (SO), sodium chloride (NaCl), and atomic See more
Although Simon Marius is not credited with the sole discovery of the Galilean satellites, his names for the moons were adopted. In his 1614 … See more
The first reported observation of Io was made by Galileo Galilei on 7 January 1610 using a 20x-power, refracting telescope at the See more
Io plays a significant role in shaping Jupiter's magnetic field, acting as an electric generator that can develop 400,000 volts across itself and create an electric current of 3 … See more
Wikipedia text under CC-BY-SA license High Resolution Global View of Io - NASA Science
Dec 18, 1997 · The color is composed of data taken, at a range of 487,000 kilometers, in the near-infrared, green, and violet filters and has been enhanced to emphasize the extraordinary variations in color and brightness that …
Io: A guide to Jupiter's volcanic moon | Space
Oct 26, 2022 · Its average orbital distance is about 262,000 miles (422,000 km). Io takes 1.77 Earth -days to orbit Jupiter. Io is tidally locked, so the same side always faces Jupiter. Size: Io has a mean ...
Global image of Io (true color) - NASA Jet Propulsion …
Aug 27, 1999 · Most of Io's surface has pastel colors, punctuated by black, brown, green, orange, and red units near the active volcanic centers. A false color version of the mosaic has been created to enhance the contrast of the …
Io Facts - Science@NASA
Jupiter's rocky moon Io is the most volcanically active world in the solar system, with hundreds of volcanoes, some erupting lava fountains dozens of miles (or kilometers) high. Io’s remarkable activity is the result of a tug-of-war between …
A reconstruction of Io's true color | The Planetary Society
Mar 29, 1998 · The right image has a blue channel synthesized from blue and green filter images (blue = 0.55*green + 0.45*violet) and may be a closer representation of the color that Io would appear to the human observer.
However, long before the Voyager space craft encounters in 1979, Earth-based observations revealed that Io is very different from the Moon: it has an unusual spectral reflectance, …
Map of Jovian Moon Io - NASA
Sep 16, 2009 · This basemap of Jupiter's moon Io was produced by combining the best images from both the Voyager 1 and Galileo Missions.
Global View of Io (Natural and False/Enhanced Color)
The top disk is intended to show the satellite in natural color, similar to what the human eye would see (but colors will vary with display devices), while the bottom disk shows enhanced color to highlight surface details.
Global View of Io in various colors - NASA Jet …
Mar 6, 1998 · These full disk views of Jupiter's volcanic moon, Io, use images which were acquired by NASA's Galileo spacecraft when Io, the spacecraft, and the sun were nearly all aligned (near zero degrees phase angle). This angle …
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