A wedge of the star's own returned light drives the Sun off its course.
This is a fully speculative artistic imagining — nothing of the kind exists, is planned, or is within any known engineering reach. It pictures a stellar engine at its wildest: a mirror the size of a planet's orbit, held up by the light it reflects, returning a share of the Sun's own output to the Sun so that the unbalanced push moves the star — and everything orbiting it — onto a new course, the wedge of returned light arriving at the empty circle the system is being steered toward.Image: poweringspace.com. Artistic imagining.