Due to being tidally locked, there is a huge cyclone on its daytime side. It was first visited by the Bullet probe in 2057.
During the terraforming of Aeros, many minerals were mined from the surface and transported to the neighboring world in order to better speed along the terraforming process.
Helion is now under the control of the Aerosian government and is the location of several mining stations due to the presence of valuable minerals beneath the surface.
Cassandra Goodman was the first person to set foot on Helion in 2362 CE.