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Jupiter has 95 moons that have been officially recognized by the International Astronomical Union. But the number doesn't capture the complexity of the Jovian system of moons, rings and asteroids. The giant planet has thousands of small objects in its orbit.
After enduring a five-year, 1.7 billion-mile journey from Earth, and evading showers of the most punishing radiation outside the Sun, Juno has provided breathtaking images and breakthrough discoveries from Jupiter and its moons.
Learn More About Jupiter's Moons This "family portrait" composite of the Jovian system includes the edge of Jupiter with its Great Red Spot, and Jupiter's four largest moons, known as the Galilean satellites.
Jupiter's zonal winds, going in opposite directions, generate eddies of all sizes that manifest in storms swirling in the atmosphere.... This image of Jupiter and its moon Io, at left, was taken by NASA's Cassini spacecraft on Dec. 1, 2000....
Jupiter has 95 moons that are officially recognized by the International Astronomical Union. The four largest moons – Io, Europa, Ganymede, and Callisto – were first observed by the astronomer Galileo Galilei in 1610 using an early version of the telescope.
The Juno mission's visible-light camera, JunoCam, has captured unprecedented pictures of Jupiter's poles, cloud-tops, and moons, as well as the public's attention, imagination, and assistance.
All Moons of Jupiter. Most of Jupiter's swarms of smaller moons orbit much farther out than the Galilean satellites. Of these distant moons, the larger ones may be captured asteroids. The smaller ones are likely fragments from massive collisions.
NASA’s Juno spacecraft just made the closest flybys of Jupiter’s moon Io that any spacecraft has carried out in more than 20 years. An instrument on this spacecraft called “JunoCam” returned spectacular, high-resolution images—and raw data are now available for you to process, enhance, and investigate.
Cassini captured some 26,000 images of Jupiter and its moons over six months of continual viewing, creating the most detailed global portrait of Jupiter yet. Explore NASA’s Juno spacecraft took three images of Jupiter’s Great Red on Feb. 12, 2019, that were used to create this color-enhanced view.
Jupiter's turbulent moon, Io, was photographed during a close approach by NASA's Juno spacecraft on Dec. 30, 2023.