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Callisto (moon)

Callisto is a moon of the planet Jupiter, discovered in 1610 by Galileo Galilei and named after Kallisto. It is the second largest moon orbiting Jupiter, after Ganymede, and the third largest moon in the Solar System. Callisto is almost the same ...

Carme group

The Carme group is a group of retrograde non-spherical moons of Jupiter that follow similar orbits to Carme and are thought to have a common origin. Their semi-major axes distances from Jupiter range between 22.900.000 and 24.100.000 km, their in ...

Elara (moon)

Elara is a non-spherical moon of Jupiter. It was found by Charles Dillon Perrine at Lick Observatory in 1905 and is named after the mother by Zeus of the giant Tityus. Elara did not get its present name until 1975; before then, it was simply know ...

Erinome (moon)

Erinome or Jupiter XXV, is a non-spherical moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard et al. in 2000, and given the designation S/2000 J 4. Erinome is about 3.2 kilometres in diam ...

Eukelade

Eukelade or Jupiter XLVII, is a non-spherical moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003, and got the designation S/2003 J 1. Eukelade is about 4 kilometres in diameter, a ...

Europa (moon)

Europa is a large moon of the planet Jupiter. It is a little smaller than Earths Moon and it is the sixth largest moon in the solar system. Europas diameter is about 3000 kilometers. It probably has an iron core, and an atmosphere thats mostly ox ...

Eurydome (moon)

Eurydome or Jupiter XXXII, is a moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2001, and given the designation S/2001 J 4. Eurydome is about 3 kilometres in diameter, and orbits Ju ...

Ganymede (moon)

Ganymede is the largest of over 66 moons of the planet Jupiter. It is also the largest moon in the Solar System. Ganymede is larger in diameter than the planet Mercury, but has only about half of its mass. Ganymede is much less dense. Ganymede is ...

Hermippe (moon)

Hermippe or Jupiter XXX, is a moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2001, and given the designation S/2001 J 3. Hermippe is about 4 kilometres in diameter, and orbits Jupi ...

Himalia (moon)

Himalia is the biggest non-spherical moon of Jupiter. It was found by Charles Dillon Perrine at the Lick Observatory on December 3, 1904. It is named after the nymph Himalia who bore three sons of Zeus.

Himalia group

The Himalia group is a group of prograde non-spherical moons of Jupiter that follow similar orbits to Himalia and are thought to have a common origin. The known members of the group are in order from closest to farthest from Jupiter: Elara Lysith ...

Inner moons of Jupiter

The inner moons of Jupiter are four small moons that orbit close to Jupiter. These moons are closely interconnected with the rings of Jupiter and serve as both sources and sinks of the rings material. Their semi-major axes range between 128.000 a ...

Io (moon)

Io is a moon of the planet Jupiter. It is Jupiters third biggest moon with a diameter of 3642 km, being slightly bigger than Earths moon. Io has about 400 active volcanos. Io is the most volcanically active body in the Solar System. Volcanoes eru ...

Iocaste (moon)

Iocaste or Jupiter XXIV, is a non-spherical moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000, and given the designation S/2000 J 3. Iocaste orbits Jupiter at an average distance ...

Isonoe (moon)

Isonoe or Jupiter XXVI, is a non-spherical moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2000, and given the designation S/2000 J 6. Isonoe is about 3.8 kilometres in diameter, an ...

Kale (moon)

Kale or Jupiter XXXVII, is a non-spherical moon of Jupiter. It was found in 2001 by astronomers at the University of Hawaii, and was originally designated as S/2001 J 8. Kale is about 2 kilometres in diameter, and orbits Jupiter at an average dis ...

Kalyke (moon)

Kalyke or Jupiter XXIII, is a non-spherical moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard, et al. in 2000, and given the designation S/2000 J 2. Kalyke is about 5.2 kilometres in dia ...

Kore (moon)

Kore or Jupiter XLIX is a moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003 and given the designation S/2003 J 14. Kore is about 2 kilometers in diameter, and orbits Jupiter at a ...

Metis (moon)

Metis or Jupiter XVI, is Jupiters closest moon. Metis was found in 1979 by Stephen P. Synnott in images taken by the Voyager 1 probe. Its designation was S/1979 J 3. In 1983 it was named after the mythological Metis, a Titaness who was the first ...

Orthosie (moon)

Orthosie or Jupiter XXXV, is a moon of Jupiter. It was found by a team of astronomers from the University of Hawaii led by Scott Sheppard in 2001, and given the designation S/2001 J 9. Orthosie is about 2 kilometres in diameter, and orbits Jupite ...

Pasiphae group

The Pasiphae group is a group of retrograde non-spherical moons of Jupiter that follow similar orbits to Pasiphae and are thought of have a common origin. Their semi-major axes distances from Jupiter range between 22.800.000 and 24.100.000 km the ...

Sinope (moon)

Sinope is a non-spherical moon of Jupiter. It was found by Seth Barnes Nicholson at Lick Observatory in 1914, and is named after Sinope of Greek mythology. Sinope did not get its present name until 1975; before then, it was simply known as Jupite ...

Thebe (moon)

Thebe or Jupiter XIV, is the fourth of Jupiters known moons. It was found by Stephen P. Synnott in images from the Voyager 1 space probe taken on March 5, 1979 and was given the designation S/1979 J 2. Later, it was found on images dating back to ...

Themisto (moon)

Themisto was first found by Charles T. Kowal and Elizabeth Roemer on September 30, 1975, reported on October 3, 1975 and designated S/1975 J 1. However, not enough observations were made to establish an orbit and it was subsequently lost. Themist ...

Deimos (moon)

Deimos comes from the Greek word for terror. It is the smaller moon of Mars. Its orbital period is 30.3 hours, which is 1.263 days. Deimos is only 15 kilometers in diameter. It is covered with craters, as Earths moon and other bodies without an a ...

Phobos (moon)

Phobos is one of Mars moons. The other is Deimos. Phobos is the larger of the two moons, and is only 27 kilometers in diameter. This is about as far as a car can travel on the highway in 15 minutes. It is covered with craters, as Earths moon is. ...

Moon

The Moon is Earths largest natural satellite. We usually see it in the night sky. Some other planets also have moons or natural satellites. Our moon is about a quarter the size of the Earth. Because it is far away it looks small, about half a deg ...

Giant impact hypothesis

The giant impact hypothesis is that the Moon was created out of the debris from a collision between the young Earth and a Mars-sized protoplanet. This is the favoured scientific hypothesis for the formation of the Moon. Evidence for this hypothes ...

Late Heavy Bombardment

The Late Heavy Bombardment or lunar cataclysm, is a period of time about 4.1 to 3.8 billion years ago. During this time, a large number of impact craters formed on the Moon. By inference the same thing happened on Earth, Mercury, Venus, and Mars ...

Luna 1

Luna 1) was a space probe of the Soviet Union. It was the first mission in the Luna programme and it was the first spacecraft to reach the Moon. Luna 1 made some key scientific discoveries and it is one of the best achievements of the Soviet Unio ...

Phases of the Moon

The phases of the Moon are the different ways the Moon looks from Earth over about a month. As the Moon orbits around the Earth, the half of the Moon that faces the Sun will be lit up. The different shapes of the lit portion of the Moon that can ...

List of Neptunes moons

Neptune has a total of 14 known moons. The largest moon is Triton which was discovered by William Lassell just seventeen days after Neptune was found. One hundred years later the second moon, Nereid was found. The Hubble Telescope found the 14th ...

Galatea (moon)

There is also an asteroid called 74 Galatea. Galatea or Neptune VI, is the fourth closest moon to Neptune. It is named after Galatea, one of the Nereids of Greek legend. Galatea was found in late July 1989 from the images taken by the Voyager 2 p ...

Halimede (moon)

Halimede is a non-spherical moon of Neptune. It was found by Matthew J. Holman et al. on August 14, 2002. Halimede follows a very inclined and very eccentric orbit seen on the image in relation to other non-spherical moons of Neptune. Halimede is ...

Nereid (moon)

Nereid or Neptune II, is a moon of Neptune. Nereid was found on 1 May 1949 by Gerard Kuiper, who suggested the name in the report of his discovery. It is named after the Nereids, sea-nymphs of Greek mythology. It was the farthest of Neptunes know ...

Neso (moon)

Neso also known as Neptune XIII, is the farthest non-spherical moon of Neptune. It was found by Matthew J. Holman, Brett J. Gladman, et al. on August 14, 2002, though it went unnoticed until 2003. Neso orbits Neptune at a distance of more than 48 ...

Proteus (moon)

Proteus or Neptune VIII, is the second biggest moon of Neptune, and its biggest close moon. It is named after Proteus, the shape-changing sea god of Greek mythology. Proteus was found from the images taken by Voyager 2 probe during the Neptune fl ...

Psamathe (moon)

Psamathe or Neptune X, is a non-spherical moon of Neptune. Psamathe was found by Scott S. Sheppard and David C. Jewitt in 2003. It orbits Neptune at a distance of about 46.695.000 km and takes almost 25 Earth years to make one orbit. It is about ...

Sao (moon)

Sao is a non-spherical moon of Neptune. It was found by Matthew J. Holman et al. on August 14, 2019. Sao orbits Neptune at a distance of about 22.4 million km and is about 44 kilometers in diameter assuming an albedo of 0.04. Sao has a very incli ...

Triton (moon)

Triton, Cowzilla, a portmanteau of cow + Godzilla, or Neptune I, is the largest moon of the planet Neptune. It is the seventh-largest moon in the Solar System. Triton is slightly smaller than Earths Moon. Triton has a complicated geological histo ...

Charon (moon)

Charon is a moon of the dwarf planet Pluto. It is half as wide as Pluto and is much like the dwarf planet itself. It was discovered many years after Pluto.

Hydra (moon)

Hydra is the farthest moon of Pluto. It was found along with Nix in June, 2005 by the Hubble Space Telescopes Pluto Companion Search Team, which is composed of Hal A. Weaver, Alan Stern, Max J. Mutchler, Andrew J. Steffl, Marc W. Buie, William J. ...

Kerberos (moon)

Kerberos 1 and informally as P4) is a small moon of the dwarf planet Pluto. The satellite was discovered on 28 June 2011. It is the fourth moon of Pluto to be discovered. The others are Charon, discovered in 1978, Nix and Hydra, which were discov ...

Nix (moon)

Nix is a non-spherical moon of Pluto. It was found along with Hydra in June 2005 by the Hubble Space Telescope Pluto Companion Search Team. The discovery images were taken on May 15, 2005 and May 18, 2005; the moons were independently found by Ma ...

Styx (moon)

Styx 1 and informally as P5) is a small moon of the dwarf planet Pluto. It was discovered on June 26, 2012, using the Hubble Space Telescope. It is the fifth moon of Pluto discovered so far. The others are Charon, discovered in 1978, Nix and Hydr ...

Moons of Saturn

The planet Saturn has 53 named moons, and another 29 which are still being studied. Many of the moons are very small: 33 are less than 10 km in diameter and thirteen moons are less than 50 km. Many of the moons are named after Titans, Giants, or ...

Albiorix (moon)

Albiorix is a non-spherical moon of Saturn. It was found by Holman, et al. in 2000, and given the designation S/2000 S 11. Albiorix is the biggest member of the Gallic group of non-spherical moons. It was named in August 2003 from one of the Celt ...

Saturns Gallic group of satellites

The Gallic group is a dynamical grouping of the prograde irregular satellites of Saturn following similar orbits. Their semi-major axes range between 16 and 19 Gm, their inclinations between 35° and 40°, and their eccentricities around 0.53. The ...

Hati (moon)

Hati or Saturn XLIII is a moon of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on May 4, 2005, from observations taken between December 12, 2004, and March 11, 2005. Hati is about 6 k ...

Ijiraq (moon)

Ijiraq is a non-spherical moon of Saturn. It was found by the team of Brett Gladman, John J. Kavelaars, et al. in 2000, and given the designation S/2000 S 6.