In 1971, three cosmonauts Dobrovolski, Volkov, and Patsayev passed away due to a valve malfunction in the Soyuz 11 capsule. They remain the only people who have passed away above the Kármán Line - the defining line of space. inquestion.co.uk Submitted by sciencekenyon t3_10kg9tc on January 24, 2023 at 9:06 PM in space 43 comments 1,168