Random Planet Generator – 8 Planets, Dwarf Planets, Moons

How it works

This random planet generator draws one of the eight planets in our solar system, from Mercury to Neptune, with a line on what makes it stand out. Switch to dwarf planets or moons for 26 more worlds.

Read the full guide

A planet for a project or a quiz

Press once and the planet is yours to research, draw or model. The line under it gives its place from the Sun and one fact to start from, such as Venus being the hottest planet.

Dwarf planets and moons

After the first press, the list beside the button switches to the 5 dwarf planets, Ceres, Pluto, Haumea, Makemake and Eris, or to 21 large moons, from Earth's Moon to Neptune's Triton. That makes it a random space object generator for a harder round.

Tips

Draw 3 and put them in order from the Sun before you read the cards.

Questions and answers

How many planets are in our solar system?

Eight: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Pluto was counted as a ninth until 2006, when astronomers adopted a new definition of a planet and it became a dwarf planet.

Which moons are on the list?

Twenty-one large ones: Earth's Moon, the two moons of Mars, Jupiter's four Galilean moons, seven of Saturn's, five of Uranus's, Neptune's Triton and Pluto's Charon. Small moons, of which there are many, are left out.

Where do the facts come from?

Each line is ours, written from the opening of that planet or moon's English Wikipedia article, read on 24 September 2026. Figures such as Neptune's 164.8-year orbit are rounded as the article gives them.

All 34 worlds

Planets 8

Earth Planet 3 from the Sun and the only place known to have life. Ocean covers about 71% of its crust.
Jupiter Planet 5 from the Sun and the largest: a gas giant with nearly 2.5 times the mass of all the other planets together.
Mars Planet 4 from the Sun, the Red Planet, named for its orange-red look. A cold, rocky desert.
Mercury Planet 1 from the Sun and the smallest planet. Rocky, with a cratered surface like the Moon's.
Neptune Planet 8, the farthest known from the Sun. An ice giant that takes 164.8 years to go round once.
Saturn Planet 6 from the Sun and the second largest. A gas giant that takes about 29.5 years to go round the Sun.
Uranus Planet 7 from the Sun. A cyan ice giant tipped on its side, so each pole gets about 42 years of sunlight, then 42 of dark.
Venus Planet 2 from the Sun and the hottest: about 464 °C at the surface, under clouds of sulfuric acid.

Show all 34 worlds (26 more)

Dwarf planets 5

Ceres Dwarf planet in the asteroid belt between Mars and Jupiter. Found in 1801, the first object seen in the belt.
Eris The most massive dwarf planet known, far out beyond Neptune. Found in 2005 and never visited by a spacecraft.
Haumea Dwarf planet beyond Neptune, named in 2008 after the Hawaiian goddess of childbirth and fertility.
Makemake Dwarf planet in the Kuiper belt, found in 2005. About 60% as wide as Pluto, with frozen methane on its surface.
Pluto Dwarf planet in the Kuiper belt beyond Neptune. Counted as a planet until astronomers adopted a new definition in 2006.

Moons 21

Ariel Moon of Uranus, found in 1851. It orbits in the plane of a planet tipped on its side, so its seasons are extreme.
Callisto Jupiter's second-largest moon and the third largest in the Solar System, nearly as wide as Mercury.
Charon The largest of Pluto's five known moons, found in 1978.
Deimos The smaller, outer moon of Mars, about 12 km across. It goes round Mars in 30.3 hours.
Dione Saturn's fourth-largest moon, roughly equal parts rock and water ice, with long cliffs on its trailing side.
Enceladus Moon of Saturn about 500 km across, coated in fresh snow that makes it one of the most reflective bodies in the Solar System.
Europa The smallest of Jupiter's four Galilean moons: icy, and visible from Earth with ordinary binoculars.
Ganymede Moon of Jupiter and the largest moon in the Solar System, bigger than the planet Mercury.
Iapetus The outermost of Saturn's large moons, found by Giovanni Domenico Cassini in 1671.
Io Moon of Jupiter with over 400 active volcanoes, a little larger than Earth's Moon.
Mimas Moon of Saturn about 396 km across: the smallest body known to be rounded by its own gravity.
Miranda The smallest and innermost of Uranus's five round moons, named after Miranda in Shakespeare's The Tempest.
The Moon Earth's only natural satellite, about 384,400 km away on average. New moon to new moon takes 29.5 days.
Oberon The outermost large moon of Uranus, named after the fairy king in A Midsummer Night's Dream.
Phobos The larger and inner of Mars's two small moons, found in 1877 and named after the Greek god of fear.
Rhea Saturn's second-largest moon, about 1,528 km across, and the ninth largest in the Solar System.
Tethys Moon of Saturn made mostly of water ice, found by Giovanni Domenico Cassini in 1684.
Titan Saturn's largest moon, the only moon with a dense atmosphere, and home to lakes of liquid on its surface.
Titania The largest moon of Uranus, named after the fairy queen in Shakespeare's A Midsummer Night's Dream.
Triton Neptune's largest moon, and the only large moon in the Solar System that circles its planet backwards.
Umbriel Moon of Uranus, found on the same night as Ariel in 1851 and named after a character in a poem by Alexander Pope.

How this list was compiled: The 8 planets, the 5 bodies commonly presented as the dwarf planets (Ceres, Pluto, Haumea, Makemake and Eris; https://en.wikipedia.org/wiki/Dwarf_planet, same date) and 21 large moons of the Solar System. Each line is ours, written from the opening of the object's English Wikipedia article, fetched through the MediaWiki API on 2026-09-24 (address in x.src). Licence: own work