The space between the sun and the earth is so cold, why can the sun get hot when it shines on the earth?

This should be a very common problem. After all, we live on the earth and can feel the warmth, that is, we can get energy from the sun and make the earth full of vitality. So why can the earth be like this? And look at the following analysis.

The earth absorbs energy from the sun. When the sun shines on the earth, it can make the earth hot, because the materials on the earth can absorb the energy of the sun. In fact, not only the earth can absorb the energy of the sun, but also other celestial bodies can absorb the energy of the sun.

There are only some celestial bodies, and there is no atmosphere above them. Sunlight directly shines on the surface of that celestial body, which will make the surface temperature of the celestial body rise very quickly. However, on the side facing away from the sun, the temperature is constantly emitting because it can't absorb the energy of the sun, so the temperature on one side will be lower, which will cause the temperature difference between day and night of this celestial body to be relatively large.

For example, the surface of the moon is like this. Because there is no atmosphere on the surface of the moon, the temperature difference between day and night will become very large.

In this way, if the earth is like this, it can't absorb too much energy from the sun, because there is an atmosphere on the earth, which can absorb a lot of energy from the sun and keep the temperature in a relatively balanced state, so the temperature difference between day and night will not be so great.

So when the sun shines on the earth, it will heat the earth. The reason is very simple, because there are substances on the earth, which absorb the energy of the sun well, so it will not be as cold as space.

Why is space cold? In this way, the reason why space is so cold is that there is basically no matter in space. There is so little matter, so no matter in space can absorb energy from the sun, that is, the ambient temperature here has not been greatly improved.

Just like traveling, a person wants to travel from place A to place B, passing through place C on the way, but in order to reach the destination earlier, this person does not make any stop, but speeds up his steps to reach the destination. In this way, this person just passed by C and didn't make any stopover, so it can't be said that this person has been to C, and it rarely affects C.

In fact, there is still microwave background radiation in space, but the temperature is very low, a little close to absolute zero. According to people's feelings, this temperature will really feel very cold.

Therefore, these microwave background radiation will not play much role in the temperature in space, but will still make. Space is still cold.

To sum up, it is because there are more substances on the earth and an atmosphere, which can absorb a lot of sunlight, thus making the surface of the earth feel hotter; There is very little matter in space, so it can't absorb a lot of energy from the sun, which also leads to its relatively low temperature.