4 things to know about China’s longest-ever crewed spaceflight mission

China’s Shenzhou-13 spacecraft is about to begin its voyage to the Tiangong space station. The spaceflight is set to feature a range of pioneering moments and intriguing tasks. Here are four key facts about the mission. It’s China’s longest crewed mission yet The crew is heading for Tiangong, China’s first long-term space station, which is being constructed in low Earth orbit. China aims to complete the station by December 2022. The six-month mission will be th