Every day we feel the warmth of the sun, which is 150 million kilometers away from us. Why is space so cold when the sun is so hot? To learn the answer to this question, there are two terms that we need to know the difference between first: heat and temperature.

Heat is a form of energy that depends on the amount of matter, while temperature is just a measurement. Heat; When transferred to an object, the temperature of the object rises, and when removed from the object, the temperature of the object decreases. These transfers also take place in different ways.

How does heat transfer take place in objects?

NASA

This heat transfer takes place in three ways: conduction (conduction), convection (convection) and radiation (radiation) aspect.

• Conductivity type heat transfer in solids we will see. When the particles that make up solids are heated, their vibrations increase. In this process, heat is transferred from warmer particles to colder ones by touching each other. This type of heat transfer is what causes our hands to burn after an iron stick or iron spoon that you keep on fire comes in contact with something hot.
• As convection type in liquids or gases we testify. When the liquid is heated, the molecules rise up and carry the heat energy with them. For example, the heaters in our rooms work with this kind of heat transfer principle.
• Unlike these two processes, the radiation path is heat, light waves spreads with All objects emit thermal energy radiation at a certain level, depending on their temperature. At room temperature it radiates heat in the form of infrared waves, including to us. For example, thermal cameras can be used to measure the temperature of people. That is, matter does not arise with particles, but with waves.

Therefore the sun D150 million km from Earth Although the energy of the sun reaches the earth.

Heat is a matter of matter.

NASA

Space is a vacuum in which no matter exists. It is impossible to talk about heat transfer by conduction or convection. in space because there are not enough particles Of course we cannot speak of a heat transfer. This transfer seems possible by a single radiation. When the sun’s heat strikes an object in the form of radiation, the atoms that make up the object begin to absorb energy, and this energy moves the atoms, producing heat as the atoms vibrate.

The temperature of objects in space does not change for a long time.

Simply put, if there is nothing to heat, the temperature remains the same, it does not change. Even if a stone is heated by the sun’s rays until it boils, it will eventually cool down again. That’s the heat in empty space disappears because it has nowhere to be transferred. The answer to our question arises: space is actually very cold, because it has nothing to absorb energy from the sun.

We don’t have to go to space to feel this difference.

NASA

The sunless side of the Earth is relatively colder. Yet, thanks to our Earth’s atmosphere, it is happily compared to other celestial bodies that have no atmosphere. not close to absolute zero. Otherwise we wouldn’t be able to talk about life.

Let’s take Earth’s satellite as an example. Temperature on the constantly sunny surface of the moon It’s about 127 degrees. But on the dark side of the moon, the temperature drops to -173.

So what is the temperature of space?

Scientists for the warmth of space -270 degrees They say it’s just an average temperature. According to research, it is also known that different parts of space have different temperatures.

of the sun because there is nothing to absorb the energy that’s why space is so cold despite the scorching sun!