Planets and also Moons

How plenty of Moons go Each planet Have?

Mercury - 0Venus - 0Earth - 1Mars - 2Jupiter - 79 (53 confirmed, 26 provisional)Saturn - 82 (53 confirmed, 29 provisional)Uranus - 27Neptune - 14


Moons — also called organic satellites — come in numerous shapes, sizes and also types. They are typically solid bodies, and few have atmospheres. Many planetary moons probably developed from the discs of gas and also dust circulating around planets in the beforehand solar system.

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There are hundreds of moons in ours solar system — even a few asteroids have been uncovered to have tiny companion moons. Moons that begin with a letter and also a year are taken into consideration provisional moons. They will be offered a proper name as soon as their explorations are shown by added observations.

Of the terrestrial (rocky) planets the the inner solar system, neither Mercury nor Venus have any moons in ~ all, earth has one and also Mars has actually its two little moons. In the external solar system, the gas giants Jupiter and also Saturn and the ice cream giants Uranus and also Neptune have dozens of moons. As these planets flourished in the beforehand solar system, they were able to catch smaller objects with their big gravitational fields.

*Moons of planets and also dwarf planets. Planet /Dwarf PlanetConfirmedMoonsProvisionalMoonsTotal
Dwarf Planets
How Moons get Their Names

How Moons obtain Their Names

Most moons in our solar system are called for mythological personalities from a wide range of cultures. The newest moons uncovered at Saturn, for example, are named for Norse gods such together Bergelmir, a giant.


Shakespeare’s characters are immortalized in orbit in ~ Uranus.

Uranus is the exception. Uranus' moons are named for characters in wilhelm Shakespeare's plays therefore you’ll find Ophelia and also Puck in orbit. Various other Uranian moon names were chosen from Alexander Pope's poetry (Belinda and Ariel).

Moons are offered provisional designations such together S/2009 S1, the very first satellite discovered at Saturn in 2009. The International huge Union approves an main name when the discovery is confirmed.

Moons of the inner Solar System

Moons the the inside Solar System

Earth's Moon probably developed when a huge body around the size of Mars collided v Earth, ejecting a lot of product from ours planet right into orbit. Debris indigenous the early on Earth and the impacting body collected to type the Moon about 4.5 billion years back (the period of the oldest accumulated lunar rocks). Twelve American astronauts arrived at the Moon during's Apollo routine from 1969 come 1972, examining the Moon and bringing ago rock samples.

Usually the term moon bring to mind a spherical object, choose Earth's Moon. The two moons of Mars, Phobos and also Deimos, are different. If both have nearly circular orbits and travel close come the aircraft of the planet's equator, they are lumpy and dark. Phobos is slowly illustration closer to Mars and also could crash into the planet in 40 or 50 million years. Or the planet's gravity might break Phobos apart, producing a thin ring about Mars.

Moons that the large Planets

Moons the the giant Planets

Jupiter's menagerie the moons includes the biggest in the solar mechanism (Ganymede), an ocean moon (Europa) and also a volcano moon (Io). Countless of Jupiter's outer moons have highly elliptical orbits and also orbit backwards (opposite to the spin of the planet). Saturn, Uranus and also Neptune additionally have part irregular moons, i beg your pardon orbit far from their respective planets.

Saturn has two ocean moons – Enceladus and Titan. Both have actually subsurface oceans and also Titan likewise has surface ar seas of lakes of ethane and methane. The chunks of ice and rock in Saturn's rings (and the corpuscle in the rings of the various other outer planets) are not taken into consideration moons, yet installed in Saturn's rings are distinct moons or moonlets. These shepherd moons assist keep the rings in line. Titan, the 2nd largest in the solar system, is the just moon v a thick atmosphere.

In the kingdom of the ice giants, Uranus's inner moons appear to it is in about fifty percent water ice cream and half rock. Miranda is the many unusual; the chopped-up appearance shows the scars of impacts of big rocky bodies.

Neptune's moon Triton is as huge as Pluto and orbits backwards contrasted with Neptune's direction that rotation.

Moons that the Kuiper Belt

Moons that Dwarf Planets

Pluto's large moon Charon is about half the dimension of Pluto. Prefer Earth's Moon, Charon may have formed from debris result from an early collision of an impactor v Pluto. Researchers using the Hubble room Telescope to examine Pluto uncovered four more small moons.

Eris, an additional dwarf planet even much more distant than Pluto, has a tiny moon of its own, named Dysnomia. Haumea, an additional dwarf planet, has actually two satellites, Hi'iaka and Namaka. Ceres, the closest dwarf planet to the Sun, has actually no moons.

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More Moons

More Moons

Scientists weren't certain if asteroids can hold moons in your orbits until the Galileo spacecraft flew previous asteroid Ida in 1993. Pictures revealed a small moon, later named Dactyl.