Tauaxis is a moon of Doramir and widely considered Auraxis’ “twin” planet, similar to how Venus was once considered Earth’s “twin”. Unlike Venus and Earth however, Tauaxis and Auraxis are both life-bearing worlds overflowing with biodiversity and natural beauty. Though its atmosphere is dreadfully inhospitable to Humans similar to how Auraxis’ once was, many Humans express a desire to emigrate to it to escape the current conflict, and to transform it using lessons learned on Auraxis.

Roughly the size of Mars and much more dense, Tauaxis’ composition and geology is poorly understood due to the lack of significant Human presence. The only thing that can be gleaned for certain is that it has a prodigious amount of auraxium and the accompanying Vanu technology, their negative-energy fields being a dead giveaway. It is also expected to be extraordinarily rich in heavy metals and radioactives, given its incredible 7.76 g/cm density.
Tauaxis’ status as a habitable world came as a large surprise to early TR scientists, who noted that it fell well within Doramir’s Van Allen radiation belts and was bombarded with radiation that would ordinarily be instantly fatal to carbon-based living things. Though still based on Carbon, It appears the life on its surface has extensively incorporated non-organic elements such as Silicon, Lead and Iridium directly into their forms, essentially giving them natural body armor that protects from uncountable natural calamities, most importantly the radiation.

This has produced a situation where the planet’s natural foliage is bullet-proof, and the animals are capable of literally “eating lead”.

Being in an inferior orbit to Auraxis around their parent planet and being in a 3:1 orbital resonance, Tauaxis is nearly always visible from the Doramir-facing surface of Auraxis, being bright enough to cast shadows and cover everything in pale blue light. People traveling to the hemisphere of Auraxis that never faces Doramir or its other moons frequently describe depressive symptoms in their absence, similar to prolonged isolation.