Let's look at it first by using your own experience. Lying on the beach, whether by the sea or Mácha's lake we spend the summer heat and after a while we have to cool in cold water. However, if we use the ropeway on the same day to be driven up to the height of the 3000 m above sea level, we have to get dressed. From familiar shots of expeditions to the Himalayas, such as Mout Everest, there are temperatures around -30 ° C to -40 ° C. At the same time, let's notice that both the sea and the high mountains protect our eyes with dark glasses. Everyone knows it's protection against ultraviolet radiation. Well, we're at it. Radiation. The sun sends out a variety of particles.

Thousands of people did not know what it was heat - How does it arise, why does it get hot when we light and burn wood? When we rub two materials on ourselves; when the electric current flows through the wire or sunlight? Where does the heat come to light when we open the window in a warm room? Only in 19. century, this question was slowly explained. Heat must be generated by the movement of the small particles from which our world is composed. Heat is therefore a form of energy. Heat can be transferred, transformed into a different form of energy and stored in a backup.

Example: The gas enclosed in a container is made up of tiny particles that look like balloons moving here and there that hit each other and the walls of the container. When shaking the container, the impact will increase and the energy will also increase as the energy conservation law applies. However, atoms are billions of times smaller than any small balloons. We shake farther and stronger, creating warmth in the neighborhood. So the heat always escapes into a colder environment. Higher energy particles deliver this energy to the particles with less energy. Otherwise it does not work. If there is no energy from the outdoors, each heating cools the body. It's impossible for cold coffee to be hot again. Physics is called it entropy. A very important phenomenon arises here. That is, time is going only in one direction in our universe!

Outer space is not a vacuum (in the sense of empty space). It exists only in our terrestrial laboratories and our imaginations. The sun fuses a huge number of subatomic particles. Photons - white and visible part of light, electrons, hard radiation in the form of alpha, beta, gamma and other particles. They spread through space like the solar wind to the borders of our solar system and fall on the surface of, among other things, our planet Earth. They transfer their energy to the atoms of the air that surrounds and warms us. So if it is not poured as from a can…

[Hr]

Inspired by the question: Please, can heat dissipate in the vacuum? Regarding the heat from the Sun ... Maybe it's a trivial and well-known fact, but I do not know ... Thanks in advance for the answer, I welcome you, Marian

For this far from trivial question I am thankful and I will try to answer this extremely interesting topic.