Tetro

From Tetro Files

Tetro is a terrestrial planet located in the Harani Nebula, an oxygen- and hydrogen- filled planetary nebula near the center of the Tevral Galaxy. It is roughly 170,000 light-years from the galactic core. It exists within the same causally-interconnected universe as Earth, but it is 22.5 billion light-years away, placing it 8.8 billion light-years outside Earth's visible universe. 82% of Tetro's surface is covered in water, and it has an atmosphere composed of hydrogen and oxygen that is contiguous with the surrounding gases of the Harani Nebula. At 2,193,024 miles in diameter, it is 21,182,048 times larger than Earth by volume and has 76,695.6 times as much surface area. It is the only planet apart from Earth known to support life.

[edit] Geologic History

See Main Article: Geohistorics

Tetro was formed approximately 5.2 billion Earth-years ago from coalescing dust and gas following the supernova that created the Harani Nebula. By 4.8 billion Earth-years ago, Tetro's surface had cooled and its clouds, composed of hydrogen and oxygen, rained down water on the surface, forming the planet's oceans. Very little has changed geologically on Tetro since this time. It retains a molten core, but its crust is too thick for tectonic plates or volcanoes to form.

[edit] Biological History

See Main Article: Biohistorics

The history of life on Tetro began approximately 4.1 billion Earth-years ago when a 142,000-mile diameter asteroid called Telephica collided with Tetro, embedding itself in an enormous crater on Gamiala's North shore. Approximately 200,000 Earth-years before the impact, carbon-based self-replicating molecules had formed into protocells in the asteroid's oceans. The protocells not destroyed by the impact populated the planet's oceans and eventually evolved into Tetro's various life-forms over the following 670 million Earth-years.