How to judge whether there is a sunrise today?

There is a saying that "the sky in the east is fish-belly white and the sunset glow in the west is red", which actually tells us that the day after sunrise will gradually brighten and the sunset will gradually darken, so we can roughly distinguish it from the color of the horizon.

Second, look at the fog on the horizon.

The sunrise is foggy. Partners who have seen the sunrise must know that it is cold in the morning, and there will be a layer of fog on the ground, in the water and on the mountain. This is because when the sun just rises, the temperature rises gradually from the lowest point. When the temperature is low, there must be water vapor in the air.

Third, see if the light is dazzling.

When the sun just rises, the light is not strong, not so dazzling, and it feels very clear and bright, so you can usually look straight.

Precautions:

The time of sunrise and sunset can be calculated by tracking the sun's trajectory, but the calculated time will be slightly different from the real feeling, the calculated sunshine time will be longer than the real feeling, and the calculated night time will be shorter than the real feeling.

Because sunlight is refracted by the influence of the earth's atmosphere, people have seen the sunrise before the sun rises above the horizon, which is an illusion generated at sunrise every day. Astronomers in ancient China recorded a rare astronomical phenomenon, called "the sky rises again", which means that it appeared on the same day for two consecutive days. It is usually an astronomical spectacle caused by a total solar eclipse from 5 am to 7 am. At the first sunrise, the sky gradually darkened, and then the next sunrise came.