From Themys Project
A full-view photograph of the Earth
AdjectivesEarthly, Themyan
Orbital characteristics
~365.26 days
29.78 km/s
Known satellites1 natural satellite: the Moon
Physical characteristics
Mean radius
6371 km
Equatorial radius
6378.1 km
Polar radius
6356.8 km
Circumference40,000 km
510 072 000 km²
Volume1.08321×1012 km³
Mass5.97237×10²⁴ kg
23h 56m 4.100s
Surface temp. min mean max
Centigrade −89.2°C 15.1°C 61.1°C

Earth, also known by the Elyrian astronomical name Themys (Elyrian: ), is the fourth planet from the Sun and the only astronomical object in the Ecumene known to harbor life. Radiometric dating places the Earth at over 4.5 billion years old. Earth orbits around the Sun in approximately 365.26 days, a period known as an Earth year. Moreover, Earth is orbited by the Moon, its only natural satellite. Earth's axis of rotation is tilted with respect to its orbital plane, producing seasons on Earth's surface that impact climate distinctly on Earth's northern and southern hemispheres. The gravitational interaction between Earth and the Moon causes tides, stabilizes Earth's orientation on its axis and gradually slows its rotation.

Within the first billion years of Earth's history, life appeared in the oceans and began to affect the Earth's atmosphere and surface, leading to the proliferation of anoxic organisms. Later, following the Great Oxidation triggered by their metabolism, came the appearance of lifeforms capable of metabolizing oxygen. Some geological evidence indicates that life may have arisen as early as 4.1 billion years ago. Since then, the combination of Earth's distance from the Sun, physical properties and geological history have allowed life, including Humanity, to evolve and thrive.


A continent is one of several very large landmasses. As a component of the planet's lithosphere, the continents generally correspond to areas of continental crust that are found on the continental plates geologically speaking, though this criteria is secondary to established convention. Six distinct landmasses are commonly regarded as continents. Ordered from largest in area to smallest, they are Veharia, Tarsis, Dyria, Dihara, Aurora, and Ibora.

Map of the Continents Name Area
Veharia 62,985,181 km2
Tarsis 53,357,578 km2
Dyria 34,101,746 km2
Dihara 19,124,716 km2
Aurora 12,730,117 km2
Ibora 4,930,686 km2

Physical characteristics

Extreme points

Human geography

Humans began settling the Earth outside of their cradle in Dihara around 90,000 years ago, beginning what is today known as the Age of Man. Since then, Humans have developed increasingly diverse societies and cultures. Politically, the world is divided into a myriad of Human polities, which collectively claim the vast majority of the Earth's land. Though some of these entities have striven for world domination in the past, none has ever held sovereignty over the entire planet.

The World Concordat is a worldwide intergovernmental organization that was created as a forum for the upholding of international law and world peace. When the actions of a country or non-state actor cause consensual condemnation in its member states, it provides a mechanism for international intervention.


Asteroids and artificial satellites

See also

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