Scientific research shows that the sun is a celestial body with constantly changing energy output. It is these changes that have caused strong disturbances of the state of the upper atmosphere and ionosphere. The following conclusions can be drawn:. ['The sun is a celestial body with constantly changing energy output, and its changes cause changes in space weather.', 'The constant change of solar energy output causes strong disturbance of the state of the upper atmosphere and ionosphere, which is the root cause of severe disasters.', "The continuous output of solar energy will cause drastic changes in the Earth's space environment.", 'The continuous change of solar energy is a direct factor and direct cause of natural disasters.']