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Planets Vocabulary

This page lists the eight planets of the solar system with vocabulary and related facts and figures. You may also like to see:

Planet Names
How the planets got their names: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune - and the language around them

You can scroll the table horizontally.

planet position from Sun distance from Sun (km) diameter (km) type position within solar system time to orbit around Sun visible to naked eye from Earth? when discovered god superlative(s) adjective demonym (name of fictional inhabitant) moons
Mercury 1 58,000,000 4,879 terrestrial planets inner planets 88 days yes unknown Mercurius, Roman messenger god smallest planet, closest to Sun, fastest Mercurian a Mercurian 0
Venus 2 108,000,000 12,104 225 days yes unknown Venus, Roman goddess of love and beauty brightest, hottest Venusian a Venusian 0
Earth 3 150,000,000 12,756 365 days n/a unknown none (supports life)



an Earthling

a Terrestrian

Mars 4 228,000,000 6,794 697 days yes unknown Mars,
Roman god of war
largest volcano (Olymous Mons) Martian a Martian 2
Jupiter 5 778,000,000 142,984 gas giants outer planets 11.6 years yes unknown Iuppiter, Iovis, Jovis Pater,
Roman king of the gods
largest planet, most moons, largest moon (Ganymede) Jovian a Jovian 76 + RS
Saturn 6 1,427,000,000 120,536 29.46 years yes unknown Saturnus,
Roman god of agriculture and time

biggest ring system, lightest planet in weight

Saturnian a Saturnian 20 + RS
Uranus 7 2,870,000,000 51,118 ice giants 84 years no 1781 Ouranos,
Greek god of the sky

coldest planet, rotates on its side

Uranian a Uranian 27 + RS
Neptune 8 4,497,000,000 49,528 165 years no 1846 Neptunus,
Roman god of the sea

furthest from Sun; slowest; highest sustained wind speeds

Neptunian a Neptunian 14 + RS

RS = ring system