It is now recognized that, on the one hand, the aurora is related to the large-scale interaction of the Earth's upper atmosphere and the geomagnetic field, and on the other hand, it is related to the high-speed charged particle stream emitted by the sun, which is often called the solar wind. The essential conditions for the formation of the aurora are the atmosphere, magnetic field and solar wind. All other planets in the solar system with these three conditions, such as Jupiter and Mercury, will also produce aurora around them. This has been actually observed. Proven. This text mainly introduces:. ['The role of the sun in the formation of aurora.', 'Essential elements for forming an aurora.', 'Planets with aurora phenomenon.', "People's observation and knowledge of the aurora."]