A film about documentary and popular science films. The film demonstrates the technical means used in popular science cinema. Cameramen are filming an astronaut in a state of weightlessness, in scientific laboratories, in an observatory from the board of a flying plane, under water, in the sea, in the mountains (at the top). Cinema X-ray apparatus. Night vision camera. Time-lapse movie camera. Rapid shooting. Takeoff. Metrological station, employees at the instruments. Inhabitants of the deep sea: starfish, fish. Mountain, sea, forest landscapes. Observatory. Observing a solar eclipse. Dew on the leaves. Ants. Cuckoo in the nest. Hares. Boar. Fight a wild boar with a tiger. Surgeons in the operating room. Operation. Sports. Flowers are blooming. The astronaut shoots with a movie camera.