Why does the sun change color?

1965 In the spring, there was a big sandstorm over Beijing. In an instant, the sky was dark, yellow sand was rolling, and powdery loess fell from the air. Suddenly, people found a strange phenomenon-the sun suddenly lost its dazzling light, turned blue, and slowly recovered after the sandstorm.

1883, the Krakato volcano in Indonesia erupted, and the volcanic ash floated to the high places in the earth's atmosphere, and the moon people saw at night was also blue.

Sunlight is mostly ionized light waves of hydrogen and helium atoms, which is close to the blue frequency range. It looks white because it is too bright. When passing through the atmosphere, it is absorbed by the air, resulting in a red shift in frequency. It is for this reason that the sun is red in the morning and evening. When the sandstorm weather appears, the dust particles in the air have a strong ability to absorb red light waves, so the sun looks pale blue.

From the viewpoint of astronomical science, the color of the moon is related to the principle of reflecting sunlight.

Under normal circumstances, the moon is pearly white and sometimes pale yellow. The moon appears blue only under certain circumstances. According to physicists, if there are a lot of dust particles suspended in the atmosphere and there are small water droplets in the atmosphere, then the moon will look blue.

If you are lucky, you can also watch Green Watermelon. Colorful light wheels overlap each other to produce white light. On the upper and lower edges of the sun, the colors of the nimbus are not mixed, but appear blue and blue-green on the upper edge of the sun. These two kinds of light have different fates when they pass through the atmosphere. Blue light scatters strongly and is almost invisible, while green light can penetrate the atmosphere freely. So people can see the green sun!

The sun is so beautiful that there are countless beautiful sunrises and sunsets in China. While being relaxed and happy, we can't help but pay more attention to this "mother" who can meet every day.

In the past, observing the sun was like looking at the sky in a well. For a long period of history, the ancients worshipped the sun as a god.

The Greek sun god was called Apollo. Apollo used a golden carriage to carry the sun from the eastern sea to the sky every day and disappeared into the western sea at night.

The Asdega people in Mexico even offered people as living sacrifices to the sun, believing that the sun could survive for a long time.

It was not until later that humans who started farming began to observe the sun in order to distinguish the seasons. It is said that our ancestors began to observe the sun in the Emperor Yao's era in the 27th century BC. What was the name of the official who specialized in astronomy at that time? He was mainly responsible for observing astronomical phenomena and predicting time.

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