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As of NASA’s July 2026 update, Jupiter has 115 known moons, Saturn has 293, Uranus has 29, and Neptune has 16—a total of 453. Strictly speaking, Jupiter and Saturn are gas giants; Uranus and Neptune are ice giants, so the four together are the giant planets.
How many known moons does each giant planet have?
| Planet | Type | Known moons | Examples |
|---|---|---|---|
| Jupiter | Gas giant | 115 | Io, Europa, Ganymede, Callisto |
| Saturn | Gas giant | 293 | Titan, Enceladus, Rhea |
| Uranus | Ice giant | 29 | Miranda, Ariel, Umbriel, Titania, Oberon |
| Neptune | Ice giant | 16 | Triton, Nereid, Proteus |
The figures are known or officially recognized satellites, not every bit of material orbiting a planet. NASA/JPL’s current satellite discovery listing reports the same totals. NASA/JPL Solar System Dynamics satellite discovery table
Which planet has the most moons?
Saturn currently leads, with 293 confirmed moons, more than any other planet. NASA’s Saturn page gives that figure as of August 2026. NASA Science: Saturn’s moons
Older pages can show a different number. NASA’s general facts page records Saturn at 274 in March 2025, while its newer Saturn page and current JPL listing show 293. These are counts from different update dates, not competing estimates of the same snapshot. NASA Science: Solar System planets
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Why do moon counts change?
Many moons of the outer planets are small and distant. As new objects are discovered and recognized as satellites, the catalogues and totals can be updated. JPL’s discovery table includes small objects with provisional designations as well as formally named moons, illustrating that a count depends on which objects have been identified and recognized at the time it is reported. NASA/JPL Solar System Dynamics satellite discovery table
For a broader, but older, comparison, NASA counted more than 891 confirmed moons across the solar system as of March 25, 2025. That figure includes moons orbiting planets and other bodies, so it is not the current total for the four giant planets. NASA Science: Moons
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Are Saturn’s rings counted as moons?
No. Saturn’s ring particles and chunks are not counted as moons. Distinct embedded moonlets, however, can be recognized and counted as satellites in their own right. NASA Science: Saturn’s moons
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What makes the giant planets’ moons notable?
Jupiter’s Galilean moons
Jupiter’s best-known moons are Io, Europa, Ganymede, and Callisto. Galileo first observed them in 1610. NASA notes that all four can be seen with binoculars, making them a practical starting point for observing Jupiter; that does not mean its many smaller moons are visible the same way. NASA Science: Jupiter’s moons
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Saturn’s Titan and Enceladus
Titan is larger than Mercury, and Enceladus has a global ocean beneath an icy shell, according to NASA. Their scale and physical features make them especially prominent among Saturn’s many satellites. NASA Science: Saturn’s moons
Uranus’s five major moons
Miranda, Ariel, Umbriel, Titania, and Oberon are Uranus’s five major moons. Their names come from works by Shakespeare and Alexander Pope. NASA Science: Uranus’s moons
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Neptune’s Triton
Triton is Neptune’s most prominent moon and orbits backward relative to the planet’s rotation, according to NASA’s overview of the solar system. NASA Science: Solar System planets
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