Space Blackout

A master navigator recounts being recruited by a Martian adviser to pilot a high-speed rescue mission to a distant, Earthlike world where descendants of a sunken civilization were settled. The narrative describes advanced Martian technologies—robot crews, repellor propulsion that manipulates frequencies, and telescreen communication—and the crew's race against an enigmatic, light-absorbing dark nebula that threatens to engulf the planet. The voyage covers preparation, deceleration maneuvers, and the moral imperative to evacuate thousands before the accelerating cosmic menace destroys their refuge.