The sun with a colorful halo suddenly appeared in the Swedish sky. Many people saw it. Is this an auspicious sign?

Interesting Discovery News: On the day after snowfall in a certain area of ??Sweden, that is, April 11, a very special sun suddenly appeared in the sky. The sun was surrounded by a colorful circular halo and shone on the white snow. , looks particularly beautiful. Many locals have watched this natural wonder with their own eyes. Some elderly people said it was the first time they had seen it. It aroused heated discussions among many science enthusiasts. Some even suspected that it might be an auspicious sign. Is this really the case?

In fact, this is an optical phenomenon that has occurred in many places around the world. It is called "sun dog" in science. For the sun dog phenomenon to occur, the sky must meet three necessary conditions: The first condition is that the temperature in the upper air is very low, close to minus 30 degrees Celsius. The second condition is that the air is relatively humid and there are cirrus clouds containing a lot of water vapor. The third condition is that there must be light conditions. Without light, what would happen? optical phenomena.

When the water vapor in cirrus clouds in the air encounters extreme cold, it will automatically condense into extremely pure gem-like ice crystals, forming very neat edges and corners, as if cut by a knife, sparkling in the sun , looks very beautiful and moving, and is easily associated with diamonds, so some people call it "diamond dust". The most amazing thing is that diamond dust can automatically arrange itself in a certain direction with the help of the movement of air flow, thereby refracting light.

So generally speaking, the sundog phenomenon is more likely to occur in very cold winters, but in northern areas where it is cold all year round, it may occur at any time. Although it is now March, a time when the weather in northern hemisphere countries is relatively warm, a large number of tiny ice particles are still flying in the air in some Arctic countries, especially in the sky after snowfall. These flying ice crystals capture the light and bend it into bright 22 degree halo.

In fact, the sun dog phenomenon has occurred many times in our country. The most recent one occurred on the last day of 2019. Many people in Fuyu City, Jilin, Northeast my country, saw three suns appearing side by side in the sky. , many Chinese people said that the timing is too coincidental. This may be an auspicious sign for the coming of 2020. Is this true? Later, Chinese experts also came forward to explain that this was just a natural optical phenomenon that usually appeared the next morning after snowfall.

So, the appearance of the sun dog phenomenon does not mean that something good or bad has happened, but an optical phenomenon that will naturally appear when the conditions are met. So don’t panic, but look at nature with a scientific attitude. Phenomenon, no longer obsessed with past superstitious ideas. Of course, when artificial snowmaking machines in ski resorts are working, sundog phenomena will also occur nearby, because the snowmaking machines throw a large number of tiny ice crystals into the sky. In any case, those who see the sundog must be very lucky.

For interesting science exploration content, please follow the only WeChat public account: Interesting Discovery