China's Tiangong space station: what it is, what it's for, and how to see it

China’s space program is making impressive progress. The country only launched its first crewed flight in 2003, more than 40 years after the Soviet Union’s Yuri Gagarin became the first human in space. China’s first Mars mission was in 2020, half a century after the US Mariner 9 probe flew past…

© La Conversation - lundi 10 mai 2021