Spheron

Spheron, also known as Geometrica VI, initially known as New Archenar, Archenar II or Archenar Reborn, is a fictional extrasolar super-earth planet that is part of the fictional Geometrica (Or Geo) trinary star system (also known as the Spheron system) 500 light-years from Earth, which consists of three red dwarf stars and thirteen planets, as well as various planetoids and moons. It is the sixth planet from the two orbiting stars at the center of the system, Geo A and B. The third star, Geo C, has an orbit around the inner four planets, splitting the system into an inner ring and an outer ring. Spheron is an M-class terrestrial planet roughly double the size of Earth, though it has a mass equivalent to that of Earth, so the gravity is identical on both planets. Approximately half of the planet's surface is covered with water, and it is the adoptive home of the Spherimals after the destruction of their former home planet Archenar, as well as harboring Rodentsaurs, and many other lifeforms. Its surface is similar to that of Earth, but with magical and mystical plants and animals, as well as strange phenomena on the surface. Spheron has a stable circular orbit around the central stars. It orbits at the same speed as the third star that separates the outer system from the inner and resides along with its sister planet Cubos in the habitable zone of this star. Cubos is tidally locked to this star, and owing to the scorching temperatures on the day side, its Cuban inhabitants, not to be confused with the Cubans of Cuba on Earth, live on the night side, and the permanent terminator line in eternal twilight. Spheron's atmosphere is similar to Earth's, but with a lower concentration of greenhouse gases and barely any pollutants, meaning it is breathable by humans.

Spheron is one of seven planets, ten moons, and nine planetoids in its system that can support life and is the original home of Team Season and Team Holliday. It orbits the central stars once every 3 Earth years, and rotates at the same speed as Earth. It was formed roughly five billion years in the past by the Angel Michael Clearwater, who had been summoned by the Angel's Favor device in the Geometrica nebula, then aided the Spherimals by converting the attacking Black Moon Clan's fleet, as well as the nebula itself and the ice fields within it, into a new, habitable star system. In the twilight of the 25th century, both Spheron and its moons were occupied for five Spheronian years by the intergalactic technology and robotics company SKYtech, during which their inhabitants were exploited and imprisoned, and suffered greatly.

Spheron has three moons, Arcaelion (Named after Archenar's parent star), Kerithis (Named after Archenar's closest planetary companion), and Circulon, all of which are habitable garden worlds, known to harbor vast amounts of zoological and botanical life. Of these, Circulon is the largest. While Kerithis and Arcaelion formed along with Spheron, Circulon is not a naturally-formed satellite. Formerly a rogue planet with an irregular orbit, Circulon was captured by Spheron's gravity and entered a stable orbit. Once a frozen ice world because of its distance from the central stars, Circulon is now an M-class terrestrial moon, due to the large amount of water ice, stable magnetic field from tidal heating, and habitable atmosphere. Circulon's surface is covered with water, and there are Spherimals and other lifeforms living on it. Circulon is roughly one-half of Spheron's size, or approximately the same size as Earth, with Arcaelion and Kerithis being one-fourth of Spheron's size. Because they formed along with the planet and are close enough to be affected by tidal interactions, Arcaelion and Kerithis are both tidally locked to Spheron. However, Circulon is a captured planet and orbits close enough to avoid drifting away from Spheron, but is also far enough from Spheron that it rotates independently of its parent planet once every 18 hours.

After committing atrocities synonymous with their deadly sin personifications in the late 2480's, the Season Siblings were exiled in the year 2490 from Spheron to Earth, which they had heard all about as young children. Due to time dilation, they arrived on Earth as it was in the year 1990, 500 years earlier than when they left Spheron.