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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.
Global image of Jupiter's moon Io acquired by Juno's JunoCam camera on 30 December 2023. The Juno spacecraft was launched in 2011 and entered orbit around Jupiter on July 5, 2016. Juno ' s mission is primarily focused on improving our understanding of Jupiter's interior, magnetic field, aurorae, and polar atmosphere. [88]
Io completes one orbit around the planet every 42.5 hours. Jupiter’s massive gravitational influence squeezes Io as it orbits the planet, like a hand squeezing a rubber ball, which warms up the ...
Tupan Patera on Io. Io (Jupiter I) is the innermost of the four Galilean moons of Jupiter; with a diameter of 3642 kilometers, it is the fourth-largest moon in the Solar System, and is only marginally larger than Earth's moon. It was named after Io, a priestess of Hera who became one of the lovers of Zeus. It was referred to as "Jupiter I", or ...
The pioneering Juno spacecraft, which arrived at Jupiter in 2016 and is now swooping by the planet's intriguing moons, recently snapped images of the Jovian moon Io from some 32,044 miles (51,570 ...
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 ...
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.
A picture of Jupiter and its moon Io taken by the Hubble Space Telescope. The black spot is Io's shadow. Jupiter and the Great Red Spot (visible on the lower right), with Ganymede (immediately on the upper right) casting its shadow on Jupiter. The other moons are Europa (further right), Io (first on left), and Callisto (furthest on left).