Aron is a wet, highly hospitable planet and the home of everything Aronians have ever known. It orbits about 0.99 AU away from Hope and is the second largest rocky planet in the Hope system, with a diameter of 12,251km. It takes roughly 358 days for Aron to orbit Hope and said orbit has very slight inclination and eccentricity. Aron is full of diverse environments, from forests to mountains and deserts, anything can be found. Aron's average temperature is 27 degrees celcius, making it the most livable planet in not just the Hope system, but the entire Hope and Fate system as a whole. The planet has an atmosphere composed of 77.9% nitrogen, 20.9% oxygen, and small percentages of other gases.
Aron is not just unique in its habitability but also its moons. Aron has two moons, Nyx and Parvus, with a diameter of 3470km and 2676km respectively, making them among the largest moons of any non-gas giant planet in the Hope and Fate system.
Nyx is a white-grey essentially airless moon with a large amount of cratering and due to this, freezing temperatures as low as -52 degrees Celsius. It orbits an average of 304,412 kilometers away from Aron with limited eccentricity. Nyx likely formed during Aron's earlier formation when it slammed into another protoplanet.
Parvus, in contrast, is a temperate ocean moon. It has a thick atmosphere for its size, triple the pressure of Sera and in some areas up to 10% the thickness of Aron's. This atmosphere consists mainly of carbon dioxide and smaller amounts of propane and nitrogen, giving the moon a distinctive light blue color and an average temperature of 8-9 degrees Celsius. Unlike Nyx, Parvus is not heavily cratered, with the only noticeable craters being a few extremely large craters on its surface which form much of the basin for its vast oceans of ammonia mixed with small amounts of Copper (II) Chloride.
These craters, along with Parvus' wildly different chemical composition, orbital eccentricity, and inclination compared to Nyx, suggests that Parvus is not from the Aron system. It is likely that during the formation of the Hope system Parvus was a protoplanet orbiting quickly somewhere around Sera's orbit, and may have grazed Sera, giving Parvus its craters and flinging it outward towards Aron's orbit where it was eventually pulled into a stable orbit around Aron along with Nyx. However it formed, Parvus is a unique part of the Aron system, and on nights where Nyx is not visible, Parvus casts a pale blue glow on Aron.