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    https://en.wikipedia.org/wiki/Exploration_of_Io

    Exploration of Io - Wikipedia

    The 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. Italian astronomer Galileo Galilei was the first to record an observation of Io on January 8, 1610, though Simon … See more

    Discovery: 1610

    The first recorded observation of Io was made by Tuscan astronomer Galileo Galilei on January 7, 1610 using a 20x-power, refracting … See more

    Voyager era: 1979–1995 image
    Galileo era: 1995–2003 image
    Io as a world: 1805–1973

    Improved telescopes and mathematical techniques allowed astronomers in the 19th and 20th centuries to estimate many of Io's physical … See more

    Pioneer era: 1973–1979

    In the late 1960s, a concept known as the Planetary Grand Tour was developed in the United States by NASA and the Jet Propulsion Laboratory (JPL). It would allow a single … See more

    Galileo era: 1995–2003

    Planning for the next NASA mission to Jupiter began in 1977, just as the two Voyager probes were launched. Rather than performing a flyby of the Jupiter system like all the … See more

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    Io as a tool: 1610–1809 image
    Io as a tool: 1610–1809

    For the next two and a half centuries, because of the satellite's small size and distance, Io remained a featureless, 5th-magnitude point of light in astronomers' telescopes. So, the determination of its orbital period, along with those of the other Galilean satellites, … See more

    Post-Galileo Era: 2003–2016 image
    Voyager era: 1979–1995

    The first close-up investigation of Io using high-resolution imaging was performed by the twin probes, Voyager 1 and Voyager 2, launched on September 5 and August 20, 1977, … See more

    Post-Galileo Era: 2003–2016

    Following the end of the Galileo mission, astronomers have continued monitoring Io's active volcanoes with adaptive optics imaging from the See more

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    Discovery: 1610
    Io as a tool: 1610–1809
    Io as a world: 1805–1973
    Pioneer era: 1973–1979
    Voyager era: 1979–1995
    Galileo era: 1995–2003
    Post-Galileo Era: 2003–2016
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  2. Wikipedia
    https://en.wikipedia.org/wiki/Io_(moon)

    Io (moon) - Wikipedia

  3. Wikiwand
    https://www.wikiwand.com/en/Exploration_of_Io

    Exploration of Io - Wikiwand

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    Exploration of Jupiter
    Exploration of Io
  4. Science Mission Directorate
    https://science.nasa.gov/jupiter/moons/…

    Io: Exploration - Science@NASA

    Io: Exploration. Most of what we know about Io comes from Galileo spacecraft, which made a detailed study of the Jupiter system—including Io—from orbit from December 1995 to September 2006, but it was Voyager 1 that spotted the first …

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    Exploration of Jupiter
    Exploration of Io
    Galileo Spacecraft
    Voyager 1
  5. NASA Jet Propulsion Laboratory (JPL)
    https://www.jpl.nasa.gov/news/nasas-j…

    NASA’s Juno Gets a Close-Up Look at Lava Lakes on …

    Jun 26, 2024 · New findings from NASA’s Juno probe provide a fuller picture of how widespread the lava lakes are on Jupiter’s moon Io and include first-time insights into the volcanic processes at work there.

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    Jet Propulsion Laboratory
    Lava Lakes
  6. Wikipedia
    https://en.wikipedia.org/wiki/Explorati…

    Exploration of Jupiter - Wikipedia

    The discovery of volcanic activity on the moon Io was the greatest unexpected finding of the mission, as it was the first time an active volcano was observed on a celestial body other than Earth. Together, the Voyagers recorded the eruption …

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    Exploration of Jupiter
    Galileo Spacecraft
    Outer Space
    Voyager 1
  7. People also ask
    When was Io discovered?
    The 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.

    Exploration of Io - Wikipedia

    en.wikipedia.org
    Who discovered the moon Io?
    Io is one of the four moons of Jupiter discovered by Galileo in 1610. Io was named for a mythical nymph who worshiped Hera, Jupiter’s wife, before becoming Jupiter’s lover. Io was studied by Ole Romer in 1676. He was studying the eclipses of Jupiter’s moons and used this information to estimate the speed of light.

    The moon Io - History, geography, atmosphere, exploration

    solarsystemwiki.org
    What do we know about Io?
    Most of what we know about Io comes from Galileo spacecraft, which made a detailed study of the Jupiter system—including Io—from orbit from December 1995 to September 2006, but it was Voyager 1 that spotted the first signs of the little moon’s powerful volcanism in 1979. Since 2003, three spacecraft—Ulysses, Cassini, New Horizons and Juno—have […]

    Io: Exploration - Science@NASA

    science.nasa.gov
    Which spacecraft spotted Io in 1979?
    It was Voyager 1 that spotted the first signs of the little moon’s powerful volcanism in 1979. Since 2003, three spacecraft – Ulysses, Cassini, New Horizons, and Juno – have made additional close observations of Io. Juno is currently orbiting Jupiter, but its prime mission is focused on the giant planet, not the moons.

    Io - NASA Science

    science.nasa.gov
    Did Galileo Galilei discover the moon 'Io'?
    Io has intrigued the astronomers since 1610, when Galileo Galilei first discovered the Jovian moon, which is slightly larger than Earth's Moon. Some 369 years later, NASA’s Voyager 1 spacecraft captured a volcanic eruption on the moon. Subsequent missions to Jupiter, with more Io flybys, discovered additional plumes — along with lava lakes.

    NASA’s Juno Gets a Close-Up Look at Lava Lakes on Jupiter’s Moon Io

    jpl.nasa.gov
    Is Io a volcano?
    Io is the fifth closest in of Jupiter’s many moons and the closest large moon. Io became the first place outside of Earth known to have volcanic eruptions. And Io is the most volcanic and geologically active place known to man. Its molten core is half as wide as the moon itself. Io is roughly 3,600 kilometers across.

    The moon Io - History, geography, atmosphere, exploration

    solarsystemwiki.org
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  8. Science Mission Directorate
    https://science.nasa.gov/jupiter/moons/io

    Io - NASA Science

    Jupiter's 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.

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  9. Science Mission Directorate
    https://science.nasa.gov/jupiter/moons/…

    Io Facts - Science@NASA

    Discovery and Namesake. Io was discovered on Jan. 8, 1610, by Galileo Galilei. The discovery, along with three other Jovian moons, was the first time a moon was discovered orbiting a planet other than Earth.

  10. NASA Solar System Exploration
    https://solarsystem.nasa.gov/studies/11//future-io...

    Future Io Exploration for 2013-2022 and Beyond, Part 1: …

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    Jupiter
    Exploration
  11. solarsystemwiki.org
    https://solarsystemwiki.org/io.php

    The moon Io - History, geography, atmosphere, exploration

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    Jupiter
    Exploration