# Do you know six secrets about the sun? The sun is not red

Do you know all six secrets of the sun?

Although the sun is only one of the more than 200 billion planets in the galaxy, the existence of the sun is of great significance to our solar system and our earth. So the following 6 secrets about the sun, you must know!

1、 How big is the sun?

The problem of how big the sun is is no longer a problem for people nowadays. Scientists have measured the size of the sun, and its diameter is about 1392000 km. Seeing this number, we may just think it’s very long, but we don’t have a concept yet! Let’s give a few more examples.

The diameter of the earth is 12756 kilometers. The diameter of the sun is more than 109 times that of the earth, and its volume is 1.3 million times that of the earth. That is to say, the sun can hold 1.3 million earths.

Everest is about 8844 meters above sea level, and the diameter of the sun is equivalent to the height of 157394 Everest.

2、 How much does the sun weigh

The mass of the sun is 1.989×10 ＾ 3 billion kg, accounting for 99.86% of the total mass of the entire solar system, while the mass of the earth is only 5.965 * 10 ^ 24 kg. The mass of the sun is 330000 times that of the earth, that is, the mass of 330000 earths is about equal to the mass of a sun.

Some netizens put forward an interesting saying: if everyone eats 1kg of sun every day, it will take 9.08 billion years for the earth to eat if 6 billion people are eating it.

3、 How hot is the sun

You must have used the metaphor of the sun like a big fireball in primary school! The sun produces high temperature and heat through continuous nuclear fusion. The heat is emitted from the surface of the sun in the form of light and radiates to the earth. Therefore, we feel that the sun is sometimes “warm” and sometimes “spicy”.

The surface temperature of the sun has reached 6000 degrees Celsius and the central temperature has reached 15 million degrees Celsius. Because the temperature of the sun is so high that the matter on its surface is in a plasma state.

4、 How far is the sun from the earth

As we all know, the earth is the third farthest planet from Taidi, which is about 150 million kilometers away. If we take a supersonic plane of 2000 kilometers per hour, it will take at least 8.5 years to complete this distance.

5、 How long does solar energy last

As we all know, the life span of the sun is about 10 billion years, and it has been about 4.6 billion years since the birth of the sun. Now the sun is in the middle-aged stage, so in the next five billion years, the sun can still shine and heat steadily.

After that, the sun will enter the stage of old age, expand rapidly and become a red giant, which may engulf mercury, Venus, and even the earth, and then become a white dwarf, knowing that its internal energy has been radiated out, and finally form a black dwarf, ending its life’s “glory”.

6、 Is the sun red?

In fact, the sun is not red, nor yellow, but white.

The reason why we think the sun is red is that the angle of the sun in the morning and evening is smaller than that at noon, and the formation of light in the atmosphere is very long, so it will scatter too much blue and purple light, leaving red light.

Because there are more dust impurities in the atmosphere in the evening than in the morning, the sunset in the evening will be more gorgeous than the sunrise in the morning.

The sun is very important to us. Without the sun, the world is not only dark, but also extremely cold, making people unable to survive. And everything in the entire solar system will come to nothing.

What do you think of this? Welcome to comment area.