Rathas

Rathas (Rethios or ЯΣЪЏУЭ3 in the Rathian language) is the sole planet in the Rathian System. It is inhabited by a species that is a mix of the Chiss and Zeltron, known as the Rathians. The first signs of inhabitance/colonization exist back to 12,000 BBY, when the Chiss and Zeltron arrived at the same time on the planet. No explanation is given as to how they arrived their and why they did, due to a small war that happened between the Chiss and Zeltron inhabitants of Rathas.

History
It is estimated that the planet was created sometime around 3,000,000,000 BBY when a dwarf planet collided with a large asteroid that was knocked off course by some unnatural gravity shift, such as a supernova or black hole.