Generation Ship

A very large ship designed for STL interstellar transport. A self-contained ecosystem and thousands of inhabitants and their descendants who expect to spend up to a century or even longer getting to their destination. Rendered unnecessary by the invention of Hyperspace Drive.

It is believed that some of these might have been built some time before the Technological Dark Age on Earth (2831-2856) - but records were destroyed and confirmation is difficult. There are stories of salvage corporations finding dead Generation ships and dismantling them for their scrap value in secret.

There is also the possibility of a generation ship turning up at some point, even now.