Oa & Thios

Oa and Thios are twin stars at the centre of the solar system. Due to their close proximity, they appear from a distance as a single orb of light, and were originally mistaken as such until the astronomer Nemrodyne discovered Thios in 23 AN. To this day, they are often collectively referred to as "the Sun", despite being two separate entities.

As the larger of the two, Oa is destined to consume Thios within the next few million years, after which it will eventually explode into a supernova. This type of event is thought to have been one of the possible origins of Novium, an alien mineral with powerful unworldly properties which crash landed on Osis almost a century ago.