The sun plays a very important role in the life of our planet. It is the source of light and heat on Earth. Evaporation of water, precipitation, river flow, storms, thunderstorms, droughts and all other phenomena that determine the climate and weather on Earth depend on the heating of the Earth by the Sun and change depending on the changes that occur on the Sun.

So, according to V.I. Vernadsky, the most essential feature of the biosphere is the biogenic migration of atoms chemical elements, caused by the radiant energy of the Sun and manifested in the process of metabolism, growth and reproduction of organisms Vernadsky V.I. Biosphere ( selected works in biogeochemistry). M., 1967. - S. 56-61. .

A peculiar kind of cycles in the biosphere include its rhythmic changes. Rhythm is the repetition in time of a complex of processes that each time develop in one direction. At the same time, its two forms are distinguished: periodic - these are rhythms of the same duration (the time the Earth rotates around its axis) and cyclic - rhythms of variable duration. Periodicity in the biosphere is manifested in many processes: tectonic, sedimentation, climatic, biological, and many others. Rhythms are of different duration: geological, secular, intra-secular, annual, daily, etc.

Some rhythms are associated with uneven irradiation of the Earth due to its movement around the Sun. The change in the time of the equinoxes, the inclination of the axis of rotation to the ecliptic and the eccentricity of the earth's orbit corresponds to periods of about 21,000 years, 40,000 years, and about 92,000 years. These periods, identified by the Yugoslav scientist M. Milankovich, could be the cause of climatic fluctuations. Fundamentals of the doctrine of the biosphere. M., 1989. S. 108.

Solar radiation - the energy of solar radiation coming to Earth in the form of a stream electromagnetic waves. The sun radiates powerful electromagnetic radiation around. Only one two-billionth of it enters the upper layers of the Earth's atmosphere, but even that is a huge number of calories per minute.

Not all of the energy flow reaches the Earth's surface. Most of it is discarded by the planet in world space. The earth reflects the attack of those rays that are detrimental to the living matter of the planet. On the further way to the Earth, the sun's rays meet an obstacle in the form of water vapor filling the atmosphere, molecules carbon dioxide and dust particles suspended in the air. The atmospheric "filter" absorbs a significant part of the rays, scatters them, reflects them. The reflectivity of clouds is especially high. As a result, the earth's surface directly receives only 2/3 of the radiation that is transmitted by the ozone screen, but much of this part is also reflected in accordance with the reflectivity of various surfaces.

A little more than 100 thousand calories per 1 cm2 per minute enter the entire surface of the Earth. This radiation is absorbed by vegetation, soil, the surface of the seas and oceans. It turns into heat, which is spent on heating the layers of the atmosphere, the movement of air and water masses, and the creation of all the great variety of life forms on Earth.

Solar radiation enters earth's surface in various ways:

1) direct radiation: the receipt of radiation directly from the Sun, if it is not covered by clouds;

2) diffuse radiation: the receipt of radiation from the firmament or clouds that scatter the sun's rays;

3) thermal radiation: radiation comes from the atmosphere heated as a result of exposure to radiation.

Direct and diffuse radiation enters only during the day and together they make up the total radiation. Ta solar radiation, which remains after the reflection loss from the surface, is called absorbed. Solar radiation is measured with an actinometer.

Cosmic rays are a stream of high-energy particles falling on the Earth from all sides. Nuclear reactions in the high layers of the atmosphere are caused by cosmic rays of galactic rather than solar origin. And yet, the intensity of these cosmic rays is related to solar activity: the more spots on the Sun, the weaker the cosmic ray flux. This connection is carried out by the solar wind.

The solar wind at a distance of about 1013 m, i.e., at a distance of about fifty radii of the Earth's orbit, compresses lines of force galactic magnetic fields For details, see: Byalko A.V. Our planet earth. M., 1989. S. 133. Cosmic rays propagate mainly along magnetic field. Only the most energetic cosmic ray particles from the Galaxy can penetrate deep into this magnetic bubble around the Sun. The solar wind travels the distance to its border in half a year - a year. When the Sun is quiet, the solar wind is weaker, the boundary of the solar magnetosphere moves closer and becomes less dense. As a result, the intensity of cosmic rays reaching the Earth and the proportion of 14C in atmospheric carbon dioxide increase.

The thermal radiation of the Sun is constant. Solar activity changes only the short-wave, non-thermal part of the radiation at wavelengths less than 100 nm. This region, however, accounts for less than 1% of the total solar luminosity. The short-wave part of solar radiation does not penetrate through the upper layers of the earth's atmosphere. Therefore, solar activity practically does not change the heat flux coming to our planet, and has almost no effect on the Earth's weather. Variable short-wave radiation from the Sun significantly changes the state of only the outermost shell of the earth's atmosphere.

Both winds and currents are caused by radiation from the Sun falling on the Earth. It gives energy to the movements of the atmosphere and the ocean. This energy dissipates, turns into heat, and in this case friction forces actually arise. However, these forces are internal. For each such force that slows down the rotation of the planet, according to Newton's third law, there is an equal and opposite force that accelerates the rotation of the Earth. The total moment of all internal forces is equal to zero. Solar radiation does not change the angular momentum of the Earth - winds and currents do not, on average, slow down the Earth and do not accelerate it.

How important is the Sun to all living things? You will learn from this article.

What is the significance of the Sun to the Earth?

The sun is a huge star. And it is closest to our planet. It has long been proven that the vital activity of all living organisms, including people, depends directly on solar energy. All processes that occur on the Earth are subject to its influence.

The sun heats up the earth's crust. And solar radiation entering the planet is the main climate-forming factor. The direct rays of the Sun heat the surface of the earth, and it gives off the received heat to the atmosphere. Different parts of the planet receive different amounts of radiation. And if it were not for the hot Sun, then living organisms would not be able to live on the planet due to the very low temperature.

In addition, our luminary has a significant impact on earth's atmosphere. Thanks to this, we observe a variety of natural phenomena. The phenomena that occur on earth thanks to the Sun - rain, fog and snow could not occur without the beneficial influence of solar energy.

Plants and animals also exist only thanks to the energy of the warm star. Vegetation provides us fresh air. And it is saturated with oxygen through the interaction of chlorophyll (found in green leaves) with the sun's rays.

Also, the Sun is the main source of energy, which is necessary for the development of industry. Under its influence, oil and coal are formed. Animals also maintain their strength by eating plants with stored solar energy.

The influence of the sun on man

The energy of the luminary has a beneficial effect on the human body.

Thanks to the Sun, life appeared on our planet, sunlight provides the vital activity of all living things. The benefits of the Sun are unambiguous and undeniable.

Without the Sun, there would be no green meadows, shady forests and rivers, flowering gardens, grain fields on Earth, neither man, nor animals, nor plants could exist.
FROM scientific point vision, all actions that take place on Earth, one way or another obey the Sun. For example, the Sun affects the gaseous atmosphere that surrounds the entire globe, as a result of which we can observe various natural phenomena in the form of precipitation, wind or fog.

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The sun contains huge amount energy. Only about a billionth of this energy reaches the Earth. But it is thanks to her that the water cycle occurs on Earth, life has developed and is developing.

The positive influence of the Sun on the human body was noticed already in ancient times. Sick and weakened people were prescribed walks on outdoors and sunbathing. This contributed to the improvement of their health. Regular sunbathing helps to improve metabolism and blood composition, increase overall tone.

It has long been proven that sunlight can kill pathogens of many diseases., including such serious ones as skin tuberculosis. In addition, under the influence of ultraviolet rays in the human body, vitamin D is produced, on which the strength of our bones and teeth depends. With a deficiency of this vitamin in children, rickets occurs.
In the brain, under the influence of the sun, serotonin is produced - a hormone that plays a huge role in the processes of blood clotting, it is also called the "hormone of happiness", the presence of serotonin in the blood in sufficient quantities improves mood.
Charging with solar energy, the body receives a powerful positive impulse, the mood is evened out, nervous system calms down. Sunbathing is the best stress reliever!

Without sunlight there is no life, just as there is no life without air and water. For animals and plants, the Sun is the same source of strength as it is for man, who, unfortunately, too rarely knows how to use the beneficial effect of sunlight on his body.
Everything that exists on Earth depends on sunlight. If the Sun suddenly stopped its activity, then the Earth itself would freeze, and everything on it would freeze and die.
The Sun also gives us psychic energy. The philosophers of antiquity and the outstanding Russian scientist Alexander Chizhevsky spoke about this. A person also has psychic energy, so a person must definitely connect with the Sun, pay attention to it. This is not a light bulb, this is a great Luminary, without which we cannot live.
And with the whole world, turning to him with all our heart, we will receive benefit and help not only for ourselves personally, but also for the whole society. Remember the world, remember the planet, remember the Sun, and then they will remember you!

Every person sometimes thought about what role the Sun plays in the lives of people on Earth. The sun is big star, which is located closer to us than all the others heavenly bodies, and thanks to her, the origin of life on Earth began. If we look into the past, then we remember that the Sun was considered the main deity. People at all times have realized that it is thanks to sunlight that life exists on Earth.

Today, pride has so overshadowed the imagination of people that it does not allow them to think about the importance of the Sun for humanity, and most of the representatives modern society think they are "crowns of nature". And at the same time, they don’t even think about the fact that they can be deeply mistaken, because at one fine moment, nature can take cruel revenge. The time will come and our Sun will cease to exist and, at the same time, all life on Earth will perish. People will forever lose the opportunity to admire the sunrise.

The time of sunrise and sunset for any date can be calculated in the online calculator at the link.

Let's see what the Sun is important for life on Earth? From a scientific point of view, all actions that take place on Earth are somehow subordinate to the Sun. More specifically, solar energy. The sun affects the gaseous atmosphere that surrounds the entire globe, as a result of which we can observe various natural phenomena every day in the form of precipitation, wind or fog. A large number of Rainfall is stored in reservoirs, from where, with the help of hydroelectric power plants, energy is extracted, which the Sun used to raise water into the atmosphere.

The value of the Sun for life on Earth is important not only for animals but also for plants. Thanks to vegetation, the air on Earth is constantly being cleaned and to some extent resembles a small plant for processing carbon dioxide into oxygen. This is explained very simply. The leaves contain chlorophyll grains, which, in the process of absorbing sunlight, produce oxygen.

The following example, which once again proves to us the need for solar energy. This is an ongoing combustion process in furnaces that causes the burnt carbon of plants to recombine with oxygen, resulting in the release of energy spent on the decomposition of carbon dioxide.

Is there a replacement for solar energy, because at night, before sunrise, energy is not generated, and if the Sun suddenly goes out, humanity will die?

It should be noted that the Sun is the main source of energy for the development of industry. Since coal and oil are also of organic origin. As for the animal world, here their own forces are also supported thanks to the accumulated solar energy in plants.

Besides the sun, there is another powerful source energy - intra-atomic energy. On the this moment, it is not yet available to us and is in the process of research. The time will come when mankind will have the opportunity to test it, after which we will receive a second powerful source of energy, along with the Sun.