Some concepts, like gigantic solar sails, are allowed by the laws of physics, but require engineering well beyond today’s capabilities. Others, like matter-antimatter engines and warp bubbles ...

However, the scale of interstellar distances renders direct ... On the theoretical side, stellar engine concepts have been proposed but are poorly linked to observable technosignatures,” Vidal ...

Interstellar objects are among the last unexplored ... show that Neural-Rendezvous could benefit from a multi-spacecraft concept." To theoretically justify the empirical observations from the ...