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The advent of uncrewed spaceflight in the 1950s and 1960s provided an opportunity to observe Io up-close. In the 1960s the moon's effect on Jupiter's magnetic field was discovered. [1] The flybys of the two Pioneer probes, Pioneer 10 and 11 in 1973 and 1974, provided the first accurate measurement of Io's mass and size.
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.
Linda A. Morabito (born November 21, 1953), also known as Linda Kelly, Linda Hyder, and Linda Morabito-Meyer, is the astronomer who discovered volcanic activity on Io, a moon of Jupiter. She made this finding on March 9, 1979, at NASA's Jet Propulsion Laboratory.
Italian astronomer Galileo Galilei, known as the father of modern astronomy, discovered Io on January 8, 1610. But the moon’s wild volcanic activity wasn’t detected until Voyager 1 flew by ...
NASA says in late 2023 and early 2024 the Juno spacecraft made two close flybys of Io, coming within 1,000 of the moon’s surface, which helped to collect data on its structure.
The largest, Ganymede, is the largest moon in the Solar System and surpasses the planet Mercury in size (though not mass). Callisto is only slightly smaller than Mercury in size; the smaller ones, Io and Europa, are about the size of the Moon. The three inner moons — Io, Europa, and Ganymede — are in a 4:2:1 orbital resonance with
Located on Jupiter's moon Io, the lava lake known as Loki Patera is a whopping 127 miles across and spans over 8,300 square miles — meanwhile, Lake Ontario covers just 7,320 mi².
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 ...