|Alternative names||Augarnir, Aeduca|
|Mean orbit radius||191,485,274 km|
|Orbital period||504.045 Earth days|
|Mean radius||7,373 km|
|Surface area||170,693,945 km|
|Volume||1.679 * 10^18|
|Mass||9.26 * 10^24 kg|
|Mean density||5.52 g/cm3|
|Equatorial surface gravity||1.15 G|
|Sidereal rotation period||26 hours|
|Axial tilt||23 degrees|
|Surface pressure||105 kilopascals|
Theros is the fourth planet orbiting the star Haelos. It is the middle of three life-bearing worlds within the inner solar system, the others being Elrune and Aloris. It is the most similar planet in the Haelos system to Earth. Unique to Theros among the other life-bearing planets is the sheer amount of sophonts that have evolved on the planet. There are sixteen species of sophonts currently known to inhabit the planet.
Names and Etymology
Theros is a rocky terrestrial planet. Of the five inner planets, it has the highest size and mass while having the highest density and surface gravity of the five.
As one of three habitable planets in the inner solar system, Theros stands out as having the most biological diversity as evident by its sixteen sophont species that currently inhabit the planet.
Theros formed around 4.6 billion Earth years ago by accretion.
Chiron is the only moon of Theros.