Introduction to astronomical observatories: Beijing Planetarium currently has three astronomical observatories. In addition to the old observatory at Jianguomen, there are also two observatories on the top of the new building. The solar observatory is equipped with a solar vacuum telescope for During the day, you can watch the explosions on the solar chromosphere, sunbaths, dark streaks, spectral spots and other solar surface activities. Another public observatory has a built-in optical catadioptric telescope with a diameter of 40 cm, which is mainly used to satisfy the audience and teenagers. Students’ needs for astronomical observation and teaching practice activities.