What's wonderful about the sun at night?

In modern times, the phenomenon of "the sun rises at night" appears frequently. On the evening of August 7th, 198 1, in a village in the east district of Hanyuan County, Sichuan Province, people found the sky getting brighter and brighter while enjoying the cool in the pavilion next to the village. A red fireball crawled out from behind the western hills, giving off a dazzling light.

1On the evening of August 7, 989, a round fireball appeared in the air about 1000 meters southwest of Jiangjia Village, Liu Tang Township, xinghua city, Jiangsu Province, shining like the sun, and the river was red for about 10 minutes. At that time, nearly a thousand people in that village witnessed this spectacle, but people didn't know why the sun rose at night.

1596- 1597 winter, navigator William? When Bolenz arrived at the new island in the Arctic, it happened to meet the polar night of 176 days. William and the crew could not sail, so they had to wait for the arrival of the limit day. However, half a month before the scheduled date, one day, the sun suddenly burst out from the southern horizon. People were so surprised that they packed up and prepared to sail, but in a blink of an eye, the sun fell to the horizon and was shrouded in the dark night again.

In fact, this is impossible. Meteorologists believe that the sun that appears at night is actually a circular aurora, that is, a corona aurora. Experts explained that the surface of the sun constantly emits a large number of high-speed charged particles, which are influenced by the earth's magnetic field and break into the upper atmosphere of the earth's poles, making the particles in the atmosphere ionize and glow. This is aurora; When the solar activity is strong, and the charged particle flow is particularly large in quantity and energy, the atmospheric height where charged particles collide will increase, and the range may extend to the middle and low latitudes.

On a clear night, the aurora of the light structure diffuses into a circular luminous body, which moves quickly and has great brightness, so it is mistaken for the appearance of the sun. Some experts believe that the sunrise at night is actually an optical phenomenon, and what is going on is still a mystery.