Rocketing off the surface of Earth and soaring across the cosmos isn’t as simple as it looks. Behind every satellite in orbit and spacecraft exploring the Solar System lies an incredible variety of propulsion systems, each designed to overcome the unique challenges of space travel. From the fiery roar of chemical propulsion that powers rockets into orbit to the efficient hum of electric propulsion guiding spacecraft through deep space, these technologies are the unsung heroes of exploration. In this episode of Tomorrow’s Universe, join Max as he breaks down how spacecraft travel across the universe, explores the cutting-edge innovations in propulsion, and imagines a future where solar sails and nuclear fusion take humanity beyond the stars.

MUSIC BY NOAH PILLEMER