Setting: Solar SystemThe planet of focus, where we will soon explore the evolution of spirits, organic life, and the avolix people, is the third planet orbiting the star Adamantria, an earthlike world which we will call Vitormar. But first, we must focus on the solar system which sets its context.

(orbits and planets not to scale)
The Adamantrian star system is similar to Sol’s, though with a few distinctions. The star itself, despite the brilliance implied by its name, is slightly smaller and dimmer. As is the case with Sol, Adamantria has many planets, asteroids, and comets orbiting around it, and in order from nearest to farthest they include four rocky planets, an asteroid belt, four giants, and a second asteroid belt containing many asteroids, comets, and dwarf planets. The nearest planet to Adamantria is fairly small, and the second and third are similar to one another in size. However, while Sol’s fourth planet is smaller, Adamantra’s fourth planet is similar in size to its second and third.
Differences between the Adamantrian system and the Solar system become more striking among the outer planets, in part due to their size and rings making them far more eyecatching. Where Sol has Jupiter, Adamantria’s fifth planet is a smaller giant, more like a slightly oversized Saturn and bearing a remarkable set of rings. The sixth planet, too, is saturn-like, though slightly smaller instead. The seventh and eighth planets are ice giants, overall similar to Uranus and Neptune, though “reversed” in position--the seventh is the smaller and denser of the two. The outer belt is not remarkably different from that around Sol, though it has less mass.
Other than Vitormar, the celestial bodies surrounding Adamantria will remain unnamed until there are people present to name them.
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The differences between the Adamantrian system and the Solar system are partially inspired by simulations of the early solar system which failed to produce Mars, basically.