Moons of Jupiter

moon of JupiterJovian systemJupiter's moonsJovian moonJovian moonsmoonsinner satellites of JupiterJupiter's natural satellitessatellites of JupiterJupiter
There are 79 known moons of Jupiter.wikipedia
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Ganymede (moon)

GanymedeNicholson RegioAtmosphere of Ganymede
The four Galileans are all over 3100 km in diameter; the largest Galilean, Ganymede, is the ninth largest object in the Solar System, after the Sun and seven of the planets, Ganymede being larger than Mercury. The current Galilean moons were still affected, falling into and being partially protected by an orbital resonance with each other, which still exists for Io, Europa, and Ganymede. Even so, the names Marius assigned are used today: Ganymede; Callisto; Io; and Europa.
Ganymede, a satellite of Jupiter (Jupiter III), is the largest and most massive of the Solar System's moons.

List of Solar System objects by size

largest25th-largest bodyequatorial radius
The four Galileans are all over 3100 km in diameter; the largest Galilean, Ganymede, is the ninth largest object in the Solar System, after the Sun and seven of the planets, Ganymede being larger than Mercury.

Europa (moon)

EuropaEuropanLife on Europa
The current Galilean moons were still affected, falling into and being partially protected by an orbital resonance with each other, which still exists for Io, Europa, and Ganymede. Even so, the names Marius assigned are used today: Ganymede; Callisto; Io; and Europa. The Voyager 1 and Voyager 2 probes visited Jupiter in 1979, discovering the volcanic activity on Io and the presence of water ice on the surface of Europa.
Europa (, Jupiter II) is the smallest of the four Galilean moons orbiting Jupiter, and the sixth-closest to the planet of all the 79 known moons of Jupiter.

Callisto (moon)

CallistoAtmosphere of Callistofourth Galilean moon of Jupiter
Even so, the names Marius assigned are used today: Ganymede; Callisto; Io; and Europa.
Callisto (Jupiter IV) is the second-largest moon of Jupiter, after Ganymede.

Amalthea (moon)

AmaltheaJupiter Vmoons of Jupiter
No additional satellites were discovered until E. E. Barnard observed Amalthea in 1892.
Amalthea is a moon of Jupiter.

Adrastea (moon)

Adrastea
The Voyager spacecraft discovered an additional three inner moons in 1979: Metis; Adrastea; and Thebe.
Adrastea, also known as Jupiter XV, is the second by distance, and the smallest of the four inner moons of Jupiter.

Thebe (moon)

Thebe
The Voyager spacecraft discovered an additional three inner moons in 1979: Metis; Adrastea; and Thebe.
Thebe also known as Jupiter XIV, is the fourth of Jupiter's moons by distance from the planet.

Metis (moon)

Metis
The Voyager spacecraft discovered an additional three inner moons in 1979: Metis; Adrastea; and Thebe.
Metis, also known as Jupiter XVI, is the innermost known moon of Jupiter.

Galileo Galilei

GalileoGalileanGalilei
The most massive of the moons are the four Galilean moons, which were independently discovered in 1610 by Galileo Galilei and Simon Marius and were the first objects found to orbit a body that was neither Earth nor the Sun.
Within a few days, he concluded that they were orbiting Jupiter: he had discovered three of Jupiter's four largest moons.

Ananke (moon)

Ananke
Himalia was discovered in 1904, Elara in 1905, Pasiphae in 1908, Sinope in 1914, Lysithea and Carme in 1938, Ananke in 1951, and Leda in 1974.
Ananke is a retrograde irregular moon of Jupiter.

Regular moon

regular satelliteregular satellitesregular
Of Jupiter's moons, eight are regular satellites with prograde and nearly circular orbits that are not greatly inclined with respect to Jupiter's equatorial plane.
There are at least 57 regular satellites of the eight planets: one at Earth, eight at Jupiter, 23 named regular moons at Saturn (not counting hundreds or thousands of moonlets), 18 known at Uranus, and 7 small regular moons at Neptune (Neptune's largest moon Triton appears to have been captured).

Valetudo (moon)

Valetudo
Among these is Valetudo, which has a prograde orbit, but crosses paths with several moons that have retrograde orbits, making an eventual collision—at some point on a billions of years timescale—likely.
Valetudo, also known as Jupiter LXII and originally known as S/2016 J 2, is a moon of Jupiter.

List of natural satellites

eighth-largest moonlargestList of moons
They are some of the largest objects in the Solar System outside the Sun and the eight planets in terms of mass and are larger than any known dwarf planet.
Jupiter has 79 moons with known orbits, of which 72 have confirmed orbits and have thus received permanent designations; of these, 57 have been named.

Scott S. Sheppard

S. S. SheppardScott SheppardSheppard
Two more were discovered in 2016 by the team led by Scott S. Sheppard at the Carnegie Institution for Science, bringing the total to 69.
Discovered moons of Jupiter (full list):

Solar System

outer Solar Systeminner Solar Systemouter planets
The four Galileans are all over 3100 km in diameter; the largest Galilean, Ganymede, is the ninth largest object in the Solar System, after the Sun and seven of the planets, Ganymede being larger than Mercury. They are some of the largest objects in the Solar System outside the Sun and the eight planets in terms of mass and are larger than any known dwarf planet.
Jupiter has 79 known satellites.

Galilean moons

Galilean satellitesGalilean moonmoons of Jupiter
The most massive of the moons are the four Galilean moons, which were independently discovered in 1610 by Galileo Galilei and Simon Marius and were the first objects found to orbit a body that was neither Earth nor the Sun.
The Galilean moons (or Galilean satellites) are the four largest moons of Jupiter—Io, Europa, Ganymede, and Callisto.

Planet

planetsFormer classification of planetsplanemo
The four Galileans are all over 3100 km in diameter; the largest Galilean, Ganymede, is the ninth largest object in the Solar System, after the Sun and seven of the planets, Ganymede being larger than Mercury. The Galilean satellites are nearly spherical in shape due to their planetary mass, and so would be considered at least dwarf planets if they were in direct orbit around the Sun.

Rings of Jupiter

ring systemJupiterJupiter's Main Ring
The Galilean moons are by far the largest and most massive objects to orbit Jupiter, with the remaining 75 known moons and the rings together comprising just 0.003% of the total orbiting mass.
*Moons of Jupiter

Leda (moon)

Ledaone of Jupiter's satellitesLéda
Himalia was discovered in 1904, Elara in 1905, Pasiphae in 1908, Sinope in 1914, Lysithea and Carme in 1938, Ananke in 1951, and Leda in 1974.

Themisto (moon)

Themisto
By the time that the Voyager space probes reached Jupiter, around 1979, 13 moons had been discovered, not including Themisto, which had been observed in 1975, but was lost until 2000 due to insufficient initial observation data.
Themisto's orbit is unusual: unlike most of Jupiter's moons, which orbit in distinct groups, Themisto orbits alone.

Voyager 2

2Voyager IIMariner 12
The Voyager 1 and Voyager 2 probes visited Jupiter in 1979, discovering the volcanic activity on Io and the presence of water ice on the surface of Europa.

Voyager 1

Voyager IVoyagerMariner 11
The Voyager 1 and Voyager 2 probes visited Jupiter in 1979, discovering the volcanic activity on Io and the presence of water ice on the surface of Europa.

Volcanology of Io

Volcanism on Ioactive volcanoIo
The Voyager 1 and Voyager 2 probes visited Jupiter in 1979, discovering the volcanic activity on Io and the presence of water ice on the surface of Europa.
The volcanology of Io, a moon of Jupiter, is the scientific study of lava flows, volcanic pits, and volcanism (volcanic activity) on the surface of Io.

Galileo (spacecraft)

GalileoGalileo spacecraftGalileo'' spacecraft
The Galileo spacecraft was the first to enter orbit around Jupiter, arriving in 1995 and studying it until 2003.
Galileo was an American uncrewed spacecraft that studied the planet Jupiter and its moons, as well as several other Solar System bodies.

Jupiter's moons in fiction

AmaltheaCallistoEuropa
Jupiter's extensive system of natural satellites – in particular the four large Galilean moons (Io, Europa, Ganymede and Callisto) – has been a common science fiction setting.