From this weekend, Beijing Planetarium will open in the evening on the next 4 Saturdays. During the first “Tonight's Sky” activity, astronomers use a planetarium to describe the starry night sky in four seasons and show audiences the mysterious astronomical phenomena. According to the Beijing Planetarium, the astronomy-themed lecture which has been suspended due to the COVID-19 epidemic will be back in January 2021. (Photos: Li Hao/GT)