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Earth and Luna.jpeg
Region: Alpha Quadrant
Sector: Sector 001
System: Sol System
Galactic coordinates:
Suns: Sol
Moons: Luna
Primary Terrain: Temperate, Plains, Desert, Jungle, Arctic, Ocean
Planet Type: M-Class
Planet Size:
Points of Interest: Starfleet Academy
Native Species: Terran
Official Language: Galactic Standard - Various Dialects
Approximate Population:
Major Cities: Paris, San Francisco, London, New York, Moscow, Sydney
Affiliation: Galaxy Alliance

Earth (or Sol III) is the third planet of the Sol System system, the Captial World of the Galaxy Alliance and Headquarters of Starfleet.




United Earth

The Federation

Galaxy Alliance

Present Day

Planetary Data

Composition and Structure

Like many terrestrial planets, Earth features five chemical and physical layers that results in it's designation as a M-class planet. The most dense layer, the Inner Core, has a diameter of 3,400 km.

The next layer, the Outer Core, of Earth is approximately 3,140 km below the surface and the transition between Inner and Outer Core occurs 5,428 km below the planet's surface. With temperatures ranging from 3904 degrees to 6702 degrees within the molten metal, it is the Outer Core that once produced the planet's internal heat. The Outer Core also produces the magnetic and gravitational sphere of influence (estimated to total 1.4 Gm or 1,400,000 kilometers in radius) via Eddy currents in the fluid that the Outer Core is primarily composed of. The Outer Core is not under enough pressure to be solid, so it is liquid even though it has a composition similar to that of the Inner Core.

Earth's next layer, known as the Mantle, is composed of three layers of differing density and approximately 2,890 km below the surface, it once caused the movement of tectonic plates on the planet. This has since stopped following the planet's natural cooling and the thinning of the Mantle layers although it was formerly under enough pressure to allow the Crust of the planet to 'float' on its solid state. It is the first solid layer of the planet's composition and acted as the transitional point between the molten metals that form the planet's Core and the space-exposed crust. Despite it's geographical proximity to the Core, it's temperatures range from 550 degrees to 985 degrees; close to the melting point of many Galactic metals but hot enough to provide an ease of movement..

The final layer of Earth's internal structure is the Crust, a composition of variety of igneous, metamorphic, and sedimentary rocks in addition to various metals that once formed deposits on the planet's surface. The upper part of the mantle is composed mostly of peridotite, a rock denser than rocks common in the overlying crust. The Crust and underlying relatively rigid Mantle make up Earth's lithosphere. Because of convection in the underlying Mantle and asthenosphere, the lithosphere was broken into tectonic plates that once moved. However due to its use as the Galactic Capital and millenia of development; these tectonic plates have been fused together through engineering efforts and the planet's natural degrading through age.

Native Species



Alliance Capital

Galactic Influence

Points of Interest

See Also

The Sol System - Sector 001

Sol • Mercury • Venus • Earth (Luna) • Mars • Asteroid belt • Jupiter (Io; Ganymede) • Saturn (Mimas; Titan) • Uranus • Neptune • Pluto

External Links

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