Light Sail
A proposed method of spacecraft propulsion using large mirrors to harness solar radiation or laser pressure, suggested by Avi Loeb as a possible explanation for 'Oumuamua's characteristics, and human efforts are already focused on developing such technology for interstellar travel.
Videos Mentioning Light Sail

Garry Nolan: UFOs and Aliens | Lex Fridman Podcast #262
Lex Fridman
A proposed method of spacecraft propulsion using large mirrors to harness solar radiation or laser pressure, suggested by Avi Loeb as a possible explanation for 'Oumuamua's characteristics, and human efforts are already focused on developing such technology for interstellar travel.

Avi Loeb: Aliens, Black Holes, and the Mystery of the Oumuamua | Lex Fridman Podcast #154
Lex Fridman
A theoretical technology that uses sunlight reflection for propulsion, proposed as an explanation for 'Oumuamua's non-gravitational acceleration and as a means for interstellar travel.