Neptune is a gaseous planet that is located in the Sol System. The planet is home to numerous gas and mineral mining facilities.
Neptune was discovered by humans before they abandoned Earth via mathematical calculations. However, when proper space travel was developed, people found the Neptune's weather to be too harsh for colonization. Several mining facilities made to harvest diamonds, carbon, methane, and nickel were placed on the planet's surface only to be shut down after humanity left Sol.
The planet's surface is covered entirely by a boiling hot ocean made of ammonia and water, with its core being made of nickel and other crystallized minerals. It's surface is subject to windstorms that reach above 300 mph.