Earth

**Earth** is the third planet from the Sun and the only astronomical object known to harbor life, in humanity's point of view. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. Earth orbits around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.

## Characteristics

### Diameter

* 12,742 Kilometers
* 7,917 Miles

## Atmospheric Statistics

### Composition

* 78% Nitrogen
* 21% Oxygen
* 1% Argon

## Other Information

### Points of Interest

* Habitable
* Unique Culture
* Beautiful Creatures in the planet

### Population

4,063,183,095 (As of 2187)

Earth is the densest planet in the Solar System and the largest and most massive of the four rocky planets. The Planet has nearly deprived it's natural resources due to intense global warming, conflicts and environmental problems that lead to the events of Dark Dystopia and Orbital Warfare.

## History

### Background

Earth, along with the other planets, is stated to have been born 4.5 billion years ago as a solidified cloud of dust and gases left over from the creation of the Sun. For perhaps 500 million years, the interior of Earth stayed solid and relatively cool, perhaps 2,000F. The main ingredients, according to the best available evidence, were iron and silicates, with small amounts of other elements, some of them radioactive. As millions of years passed, energy released by radioactive decay, Mostly of uranium, thorium, and potassium. Then gradually heated Earth, melting some of its constituents. The iron melted before the silicates, and, being heavier, sank toward the center. This forced up the silicates that it found there. After many years, the iron reached the center, almost 4,000 mi deep, and began to accumulate. No eyes were around at that time to view the turmoil that must have taken place on the face of Earth?gigantic heaves and bubblings on the surface, exploding volcanoes, and flowing lava covering everything in sight. Finally, the iron in the center accumulated as the core. Around it, a thin but fairly stable crust of solid rock formed as Earth cooled. Depressions in the crust were natural basins in which water, rising from the interior of the planet through volcanoes and fissures, collected to form the oceans. Slowly, Earth acquired its present appearance.

## Overview

Earth is a medium sized Terra planet formed over time. Great continents are divided by huge oceans and seas across the planet; Strong winds and relentless hurricanes, typhoons are the worst aspects of the planet Earth. It has been the staple of life for at least a billion years, making their people egotistical about their planet the only one to harbor life.

Earth's outer layer (lithosphere) is divided into several rigid tectonic plates that migrate across the surface over many millions of years. About 29% of Earth's surface is land consisting of continents and islands. The remaining 71% is covered with water, mostly by oceans but also lakes, rivers and other fresh water, which all together constitute the hydrosphere. The majority of Earth's polar regions are covered in ice, including the Antarctic ice sheet and the sea ice of the Arctic ice pack. Earth's interior remains active with a solid iron inner core, a liquid outer core that generates Earth's magnetic field, and a mantle that drives plate tectonics.

Within the first billion years of Earth's history, life appeared in the oceans and began to affect Earth's atmosphere and surface, leading to the proliferation of anaerobic and, later, aerobic organisms. 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 to evolve and thrive. In the history of life on Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinctions. Over 99% of all species that ever lived on Earth are extinct. Estimates of the number of species on Earth today vary widely; most species have not been described. Over 7.7 billion humans live on Earth and depend on its biosphere and natural resources for their survival.

The total surface area of Earth is about 510 million km2 (197 million sq mi). Of this, 70.8%, or 361.13 million km2 (139.43 million sq mi), is below sea level and covered by ocean water. Below the ocean's surface are much of the continental shelf, mountains, volcanoes, oceanic trenches, submarine canyons, oceanic plateaus, abyssal plains, and a globe-spanning mid-ocean ridge system.

The shape of Earth is nearly spherical. There is a small flattening at the poles and bulging around the equator due to Earth's rotation. To second order, Earth is approximately an oblate spheroid, whose equatorial diameter is 43 kilometres (27 mi) larger than the pole-to-pole diameter, although the variation is less than 1% of the average radius of the Earth.

The point on the surface farthest from Earth's center of mass is the summit of the equatorial Chimborazo volcano in Ecuador (6,384.4 km or 3,967.1 mi). The average diameter of the reference spheroid is 12,742 kilometres (7,918 mi). Local topography deviates from this idealized spheroid, although on a global scale these deviations are small compared to Earth's radius: the maximum deviation of only 0.17% is at the Mariana Trench (10,911 metres or 35,797 feet below local sea level), whereas Mount Everest (8,848 metres or 29,029 feet above local sea level) represents a deviation of 0.14%.

In geodesy, the exact shape that Earth's oceans would adopt in the absence of land and perturbations such as tides and winds is called the geoid. More precisely, the geoid is the surface of gravitational equipotential at mean sea level.

## Inhabitants

Humans, The main species of highly intelligent primates dominating the planet **Earth**. They have been the workhorse of the planet ever since the rise of humanity. They utilize tools more than any existing species on the world; As well as developing their infrastructure and major elements that made it a Level 1 technology-level civilization.

### Ethics

Earth's Galactic Ethics

**Pacifism** - The planet's support of this ethic is unquestionably high to the point where despite their centuries of warfare, they shunned using their military forces outside the planet.

**Spiritualism** - The planet is a strong supporter of this ethic.

 **Egalitarianism**  - All of their officials, politicians, and commoners have equal rights and privileges. No Special perks for high positions such as a planetary governor.

 **Xenophilia**  - Accepts all non-humanoid beings as equal to their own regardless of their contrasting appearance, culture or beliefs.

## Gallery

Frontal View from OrbitSize comparison between Earth and Nexus Prime