The aurora is related to the large-scale interaction of the earth's upper atmosphere and the geomagnetic field, and it is also related to the high-speed charged particle stream emitted by the sun, which is often called the solar wind. The essential condition for the formation of the aurora is the atmosphere Magnetic field and solar wind. It can be inferred from this that the principle of the formation of aurora? ['Aurora is a phenomenon of discharge radiation appearing in the atmosphere at high altitudes.', 'Aurora is an atmospheric luminous phenomenon caused by the solar wind entering the high-altitude atmosphere gathered over the polar regions of the geomagnetic field.', 'Aurora is a phenomenon in which the magnetic layer formed by the geomagnetic field under the solar wind condenses the solar wind particle stream into an electron beam and emits light.', 'Aurora is a phenomenon in which the solar wind particle stream is converged into an electron beam and driven into the high-altitude atmosphere, which stimulates the atmospheric molecules and atoms to emit light.']