How to tell whether there will be a sunrise today?

1. Look at the colors of the sky

There is a saying that "the fish belly is white in the east and the sunset is red in the west". In fact, it tells us that the sky will gradually become brighter after sunrise and darker at sunset. , so it can be roughly distinguished from the color of the horizon.

2. Look at the fog on the horizon

There is fog at sunrise. Friends who have watched the sunrise must know that it is relatively cold in the early morning, and there will be a mist on the ground, water, and mountains. This is because when the sun just rises, the temperature is gradually rising from the lowest point. The temperature is low, and there must be water vapor in the air.

3. Check whether the light is dazzling

When the sun has just risen, the light is not strong and not very dazzling. It feels very clear and translucent, and you can usually look directly at it.

Note:

The times of sunrise and sunset can be calculated by tracking the trajectory of the sun, but the calculated times will be slightly different than the real ones, so The calculated daylight hours will be longer than they actually feel, and the calculated night hours will be shorter than they actually feel.

Because sunlight is refracted by the earth's atmosphere, people can already see the sunrise before the sun rises above the horizon. This is an illusion created at sunrise every day. Ancient Chinese astronomers recorded a rare astronomical phenomenon called "Tian Zaidan", which means two consecutive sunrises on the same day. It is usually an astronomical spectacle caused by a total solar eclipse from 5 a.m. to 7 a.m. During the first sunrise, the sky gradually darkens, and then welcomes the second sunrise.