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An Entity of Type : dbkwik:resource/SpIhbZ5-xyGv-pUxfayU_w==, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

Io is the innermost of the four Galilean moons (the biggest four) of Jupiter.

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  • Io (Moon)
  • Io (moon)
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  • Io is the innermost of the four Galilean moons (the biggest four) of Jupiter.
  • Io (pronounced /ˈaɪ.oʊ/, or as Greek Ἰώ) is the innermost of the four Galilean moons of the planet Jupiter and, with a diameter of 3,642 kilometres, the fourth-largest moon in the Solar System. It was named after Io, a priestess of Hera who became one of the lovers of Zeus.
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HistoryText
  • Io is the innermost of the four Galilean moons of Jupiter.
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physical characteristics
  • yes
min temp
  • 90.0
Periapsis
  • 420000.0
Period
  • 152853.50471039998
Dimensions
  • 3660(xsd:integer)
Surface area
  • 4.191E7
max temp
  • 200.0
discoverer
OfficialName
rot velocity
  • 271.0
Name
  • Io
discovery
  • yes
Surface pressure
  • trace
Galaxy
  • Milky Way
mean temp
  • 130.0
surface grav
  • 1(xsd:double)
Caption
  • Click image for description
Albedo
  • 0(xsd:double)
atmosphere composition
  • 90(xsd:integer)
Sector
  • 2814(xsd:integer)
Mass
  • 8.9319
temp name
  • Surface
alt names
  • Jupiter I
Inclination
  • 0(xsd:double)
  • 2(xsd:double)
Planet
  • Jupiter
Links
  • *
Volume
  • 2.53
Eccentricity
  • 0(xsd:double)
mean radius
  • 1821.3
bgcolour
  • #a0ffa0
Satellite Of
avg speed
  • 17.334
discovered
  • 1610-01-07(xsd:date)
temperatures
  • yes
rotation
Universe
  • Real World
Escape velocity
  • 2.558
mean orbit radius
  • 421700.0
Atmosphere
  • yes
Apoapsis
  • 423400.0
Density
  • 3.528
magnitude
  • 5(xsd:double)
adjectives
  • Ionian
StarSystem
  • Sol
abstract
  • Io is the innermost of the four Galilean moons (the biggest four) of Jupiter.
  • Io (pronounced /ˈaɪ.oʊ/, or as Greek Ἰώ) is the innermost of the four Galilean moons of the planet Jupiter and, with a diameter of 3,642 kilometres, the fourth-largest moon in the Solar System. It was named after Io, a priestess of Hera who became one of the lovers of Zeus. With over 400 active volcanoes, Io is the most geologically active object in the Solar System. This extreme geologic activity is the result of tidal heating from friction generated within Io's interior by Jupiter's varying pull. Several volcanoes produce plumes of sulfur and sulfur dioxide that climb as high as 500 km (310 mi). Io's surface is also dotted with more than 100 mountains that have been uplifted by extensive compression at the base of the moon's silicate crust. Some of these peaks are taller than Earth's Mount Everest. Unlike most satellites in the outer Solar System (which have a thick coating of ice), Io is primarily composed of silicate rock surrounding a molten iron or iron sulfide core. Most of Io's surface is characterized by extensive plains coated with sulfur and sulfur dioxide frost. Io's volcanism is responsible for many of that satellite's unique features. Its volcanic plumes and lava flows produce large surface changes and paint the surface in various shades of red, yellow, white, black, and green, largely due to the sulfurous compounds. Numerous extensive lava flows, several longer than kilometres ( mi) in length, also mark the surface. These volcanic processes have given rise to a comparison of the visual appearance of Io's surface to a pizza. The materials produced by this volcanism provide material for Io's thin, patchy atmosphere and Jupiter's extensive magnetosphere. Io played a significant role in the development of astronomy in the 17th and 18th centuries. It was discovered in 1610 by Galileo Galilei, along with the other Galilean satellites. This discovery furthered the adoption of the Copernican model of the Solar System, the development of Kepler's laws of motion, and the first measurement of the speed of light. From Earth, Io remained nothing more than a point of light until the late 19th and early 20th centuries, when it became possible to resolve its large-scale surface features, such as the dark red polar and bright equatorial regions. In 1979, the two Voyager spacecraft revealed Io to be a geologically active world, with numerous volcanic features, large mountains, and a young surface with no obvious impact craters. The Galileo spacecraft performed several close flybys in the 1990s and early 2000s, obtaining data about Io's interior structure and surface composition. These spacecraft also revealed the relationship between the satellite and Jupiter's magnetosphere and the existence of a belt of radiation centered on Io's orbit. Io receives about 3,600 rem of radiation per day. The exploration of Io continued in the early months of 2007 with a distant flyby by Pluto-bound New Horizons.
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