On the afternoon of March 23, the second lesson of the "Tiangong Classroom" was officially held and broadcast live on the China Space Station, and the astronauts of shenzhou 13 were taught by Zhai Zhigang, Wang Yaping and Ye Guangfu. This is the second space lecture on the Chinese space station and the third time that Chinese astronauts have taught space.
Wei Hongxiang, a researcher at the Institute of Physics of the Chinese Academy of Sciences, gave a detailed introduction to the physical knowledge contained in the "ice and snow" experiments displayed by astronauts Wang Yaping and Ye Guangfu.
Reporter: Jiang Hanzhang, Li Shuying, Zhang Bin
Produced by the Audio and Video Department of Xinhua News Agency