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Jupiter Moons

Jupiter has 53 named moons and another 26 awaiting official names. Combined, scientists now think Jupiter has 79 moons.

There are many interesting moons orbiting the planet, but the ones of most scientific interest are the first four moons discovered beyond Earth—the Galilean satellites. More ›

Critical Science Targets

Io is the most volcanically active body in the solar system.

Europa might be the best place to look for environments where life could exist.

Ganymede is the largest satellite in our solar system. It is larger than Mercury and Pluto, and three-quarters the size of Mars.

Callisto is the most heavily cratered object in our solar system.

Related News

NASA’s Hubble Space Telescope has completed this year's grand tour of the outer solar system.

Hubble's Grand Tour of the Outer Solar System

Hubble's Grand Tour of the Outer Solar System

The next full Moon is the Beaver Moon, and there will be a near-total lunar eclipse.

Full Moon Guide: November - December 2021

Full Moon Guide: November - December 2021

During its 36th low pass over Jupiter, NASA’s Juno spacecraft captured this view of striking Jupiter's cloud bands and swirls.

Mocha Swirls in Jupiter's Turbulent Atmosphere

Mocha Swirls in Jupiter's Turbulent Atmosphere

NASA Administrator Bill Nelson laid out the path forward for early Artemis missions that will pave the way for lunar surface missions.

NASA Outlines Challenges, Progress for Artemis Moon Missions

NASA Outlines Challenges, Progress for Artemis Moon Missions

This page showcases our resources for those interested in learning more about Jupiter.

Jupiter Resources

Jupiter Resources

New Juno findings provide a fuller picture of Jupiter’s colorful atmospheric features, and offer clues about what's below the clouds.

NASA's Juno: Science Results Offer First 3D View of Jupiter Atmosphere

NASA's Juno: Science Results Offer First 3D View of Jupiter Atmosphere

NASA scientists are calling for a framework that provides context for findings related to the search for life.

Are We Alone in the Universe? NASA Calls for New Framework

Are We Alone in the Universe? NASA Calls for New Framework

JPL's lucky peanuts are an unofficial tradition at big mission events.

What Are JPL's Lucky Peanuts?

What Are JPL's Lucky Peanuts?

Hubble observations of Europa have revealed the presence of persistent water vapor – but, mysteriously, only in one hemisphere.

Hubble Finds Evidence of Persistent Water Vapor in One Hemisphere of Europa

Hubble Finds Evidence of Persistent Water Vapor in One Hemisphere of Europa

The next full Moon is the Hunter's Moon, the Travel Moon, and the Lucy Moon.

Full Moon Guide: October - November 2021

Full Moon Guide: October - November 2021

Winds in the outermost "lane" of Jupiter's Great Red Spot are accelerating – a discovery made possible by Hubble.

Hubble Shows Winds in Jupiter's Great Red Spot Are Speeding Up

Hubble Shows Winds in Jupiter's Great Red Spot Are Speeding Up

In 2023, NASA’s Volatiles Investigating Polar Exploration Rover (VIPER) will land near the western edge of the Nobile Crater at the Moon’s South Pole.

NASA's Artemis Rover to Land Near Nobile Region of Moon's South Pole

NASA's Artemis Rover to Land Near Nobile Region of Moon's South Pole

The rover will be delivered to the Moon's surface in late 2023. VIPER is the first resource-mapping mission on the surface of another celestial body.

NASA to Announce Landing Site for Artemis Lunar Robotic Rover

NASA to Announce Landing Site for Artemis Lunar Robotic Rover

The Next Full Moon is the Harvest Moon, the Fruit Moon, the Barley Moon, and the Corn Moon.

Full Moon Guide: September - October 2021

Full Moon Guide: September - October 2021

The Next Full Moon is a Blue Moon, and is also known as the Hungry Ghost Moon.

Full Moon Guide: August - September 2021

Full Moon Guide: August - September 2021

Juno used its infrared instrument during recent flybys of Ganymede to create this map a decade after Juno’s launch.

NASA's Juno Celebrates 10 Years With New Infrared View of Moon Ganymede

NASA's Juno Celebrates 10 Years With New Infrared View of Moon Ganymede

This week in 2011, the Juno mission to Jupiter launched from NASA’s Kennedy Space Center aboard an Atlas V-551 rocket.

This Week in NASA History: Juno Mission to Jupiter Launches

This Week in NASA History: Juno Mission to Jupiter Launches

The shadows cast by the roughness of the Moon’s surface create small cold spots for water ice to accumulate even during the harsh lunar daytime.

NASA Study Highlights Importance of Surface Shadows in Moon Water Puzzle

NASA Study Highlights Importance of Surface Shadows in Moon Water Puzzle

For the first time, astronomers have uncovered evidence of water vapor in the atmosphere of Jupiter's moon Ganymede.

Hubble Finds First Evidence of Water Vapor at Jupiter's Moon Ganymede

Hubble Finds First Evidence of Water Vapor at Jupiter's Moon Ganymede

NASA has selected SpaceX to provide launch services for Earth’s first mission to conduct detailed investigations of Jupiter's moon Europa.

NASA Awards Launch Services Contract for Europa Clipper Mission

NASA Awards Launch Services Contract for Europa Clipper Mission

The next full Moon goes by many names including the Buck Moon.

Full Moon Guide: July – August 2021

Full Moon Guide: July – August 2021

The probe flew closer to Jupiter's largest moon, Ganymede, than any other spacecraft in more than two decades.

Ride With Juno As It Flies Past the Solar System's Biggest Moon and Jupiter

Ride With Juno As It Flies Past the Solar System's Biggest Moon and Jupiter

A puzzler about the gas giant’s intense northern and southern lights has been deciphered.

40-Year Mystery Solved: Source of Jupiter's X-Ray Flares Uncovered

40-Year Mystery Solved: Source of Jupiter's X-Ray Flares Uncovered

Scientists are studying the effects of small impacts on Europa’s surface as they prepare to explore the distant moon with the Europa Clipper.

Surface of Jupiter's Moon Europa Churned by Small Impacts

Surface of Jupiter's Moon Europa Churned by Small Impacts

The spacecraft flew closer to Jupiter’s largest moon than any other in more than two decades, offering dramatic glimpses of the icy orb.

See the First Images NASA's Juno Took As It Sailed by Ganymede

See the First Images NASA's Juno Took As It Sailed by Ganymede