If others are considering using Universe Sandbox to detail their Worldbuilding (game material).
Hope to make hard SciFi more accessible and a lot of illustrations.
I tend to run Sandbox Games, players randomly decide one of the 100 moons of Jupiter to start their adventure it would be awesome to explain these.
"Elara is a homestead with a relatively small 200m radius habitat of 60 years old, with 80,000 people in 1MegaTon. It serves as an Inertia Tether and adds delta-V to incoming and outgoing vessels traveling in and around the Jupiter system. Like many other spin habs the cylinder is nestled inside the Asteroid to protect it... "
Elara, Himalia, Themisto, Capro are one of the Main Tether stations allowing <30km/s 𝚫V move to other systems.