Human fleet concept

500 years into the future, humanity was forced to abandon its homeworld, earth after failing all attempt to stop the collision between it and a rogue planet.
The result, a cloud ring of asteroid made up of what’s remain of the rogue planet and the once home. Humanity, forced to adapt to the cold void persevered and became a fleet based civilization. It’s a wonder what dire circumstance could become, a leverage that push mankind forward