Can I watch the sunrise on cloudy days?

Sunrise refers to what the sun looks like when it first rises above the horizon or is first seen. Generally, it refers to the time when the sun rises slowly from the eastern horizon, but it is actually defined as the moment when the sun just appears on the horizon, not the moment when the whole sun leaves the horizon.

The time of sunrise will change with the season and the latitude of different places. Traditionally, in the northern hemisphere, the sunrise time from winter solstice is the latest, but in fact, the latest sunrise time should be 65438+1early October. By the same token, the earliest sunrise on the solstice is not in summer, but in early June. Even in the equatorial region, the time of sunrise and sunset will change a little during the year.

These changes can be represented by daily trajectories. 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.