Steering an Entire Solar System
Stellar engines are massive hypothetical structures built to harness a star's power to physically move an entire solar system through the galaxy. By redirecting a star’s light into thrust, civilizations could steer their sun like a spaceship.
Imagine being able to relocate your entire home planet by pushing your sun across the stars. This concept moves beyond basic energy collection to treat a star as a massive rocket engine. Building one would require the resources of an entire solar system, marking a civilization as truly advanced. Such technology could theoretically be used to escape cosmic disasters or travel to distant parts of the galaxy.
Source: Stellar engine