China's Shenzhou-16 astronauts conducted momentum and angular momentum conservation experiments in the Mengtian Lab module of the Tiangong space station on Thursday, demonstrating these principles to students back on Earth through the observation of collisions between steel balls of different masses and the stationary and rotating states of a metal gyroscope in a microgravity environment. https://www.cctvplus.com/news/20230921/8343418.shtml#!language=1 | CCTV