The planetarium is a science instrument that simulates a starry sky performance, also known as a false antenna. Demonstrate all kinds of celestial bodies seen by people on different latitudes and longitudes on the earth on a hemispherical canopy. For example, the movement of the sun, the moon and the stars, the planets travel through the stars, and the precession of the Earth's rotation axis. It can demonstrate the movement laws of major stars, planets, clusters, and nebulae in the universe in a short period of time. The sun rises and falls, the moon's profit and loss is lacking, and it is intuitive and vivid.
The planetarium went through the first generation - the mechanical analog optical projection type planetarium (the planetarium), the second generation - the space type planetarium (the space theater), and the third generation - the digital planetarium (the digital universe) Theater) three stages of development.
The basic principle of the planetarium is to use a stellar projector to project the starry sky onto a hemispherical artificial scorpion to form a "artificial starry sky", and then project the sun, the moon, and the planet into the artificial starry sky through a sun and moon planet projector with a precision gear rotation system. In the middle, the sun, the moon, and the planets are simulated in the artificial starry sky, and the astronomical landscapes such as the celestial body rising and falling, the night sky star moving, and the like are reproduced. If you have a series of attached instruments, you can also display a variety of celestial phenomena, and even show changes in the position of the Polaris and the movement of the stars in the thousands of years. China's Beijing Planetarium is equipped with a planetarium designed and manufactured by China. It can display the star names, constellations and 24 solar terms in the Chinese and Western comparisons.
Since 1958, the optical planetarium has been manufactured. Nowadays, a large-scale domestic planetarium equipped in China can display Chinese and Western contrasting stars, constellations and 24 solar terms, with Chinese characteristics.
