The star called the Sun
Unique in the Solar system star — the Sun. Orbited by 8 planets, including our Earth, are the only detected organic life.
We all love admiring the sunsets, sunrises, Northern lights and other spectacular natural phenomena associated with the Sun, but how much do we know about him?
Myths and legends
In ancient times people could not explain the structure of the Universe, but understood the importance of heavenly bodies for life, worshipped and deified him. In different parts of the earth were created beautiful and poetic legends.
The Sun God of the ancient Egyptians — RA. According to their beliefs God day moved across the sky in a Golden boat, and by night under the earth fought against the dark forces and evil always won.
Slavs before the adoption of Christianity also worshipped the Sun, calling it Arilon or Dazhd-God. To consolidate his power, they compelled their subjects the idea that they are direct descendants of the sun. Many beliefs and rituals have survived to our time, for example, the celebration of carnival.
In the ancient myth Mage-Earth lay in darkness and the cold, yet beautiful young man, God Yarilo not gave her a «radiant eyes». Mother Earth woke up, imbibed the hot rays from which came the plants and animals, seas and lakes. Then in the bowels of the planet originated. So explain the appearance of all living things, our ancestors — the Slavs.
According to Greek mythology, the world was ruled by gods of Olympus. Helios (in the Sun), the son of the Supreme God Zeus every morning in a Golden chariot coursed through the firmament on the East side on the West. In the evening he sat in the boat and sailed her to the place where the luminary was to rise.
Scientists have found that there is a Sun more than four billion years.
The beam of sunlight need 8 minutes to reach the Earth’s surface, overcoming during this time, 150 million km.
The human eye sees the Sun, pale yellow, orange, red. In fact, it’s white, and shades it gives «atmospheric scattering» — a natural phenomenon.
Earth’s gravity is 28 times less, that means if the weight of a person on the home planet is 80 kg, then in the Sun it will increase to 2240 kg.
A star larger than the moon and 400 times, it gradually increases in size and after 8-9 billion years it will be 200 times more than now.
The core temperature of the object reaches 15 million degrees C.
The whole Solar system is in constant motion around the Galaxy, passing over 200 km per second.
The Orb is a ball of gas that has no solid core in its composition: hydrogen 92%, helium 7%.
The solar atmosphere consists of the photosphere, forming the visible surface, the chromosphere and corona. From the outer part of the crown out ionized particles called the solar wind.
Interestingly, in 1999, the Romanian authorities issued a bill of plastic with a translucent window specifically for observing total Eclipse, which was observed in this country.
To sunbathe or not?
The sun emits two types of waves, different operating in the body — infrared and ultraviolet.
Infrared creates a thermal effect, acts as a vasodilator, normalizes blood circulation, improves muscle condition.
Stimulates the brain and improves the eyesight.
Treats skin diseases, improves mood, normalizes sleep hours and wakefulness.
On the influence of ultraviolet light on the body, scientists still argue, but it is well established that the lack of it leads to health problems:
• poorly absorbed vitamins and minerals, which weakens the immune system at a cellular level the metabolism;
• aggravated chronic diseases, often proceed with complications;
• people suffering from chronic fatigue syndrome, it reduced performance.
Especially the rays of the sun children need for proper development, as deficiency of ultraviolet light inhibits the production of vitamin D.
For all the usefulness of sunbathing, they are contraindicated: for tumors, inflammatory processes in the acute form, tuberculosis, endocrine, cardiovascular and gynecological diseases.
Should not be to spend long hours in the sun older people and young children.
Excess radiation can lead to heat stroke, can affect your vision negatively affect the condition of the skin, provoke allergic reactions and hormonal disruptions.
Impact on terrestrial processes
The sun involved in photosynthesis, leads to geomagnetic storms, and those, in turn, cause the extraordinary beauty of the natural phenomenon — polar, or Northern lights.
Thanks to solar energy there are such natural phenomena as rainfall, storms, storms and more.
Only under the influence of sunlight possible existence of the plant world. In particular, without sunlight, photosynthesis is impossible.
Plants constantly purify the air, absorbing carbon dioxide and releasing oxygen. This process consumes energy that comes from the rays of our star.
In the nineteenth century scientists found that light has an effect on oxidative processes in cells, and also enhances gas exchange and tissue regeneration.
Some experts believe that the rays of light act on the body vozbujdaet home of cattle, improving digestion and speeding up the weight gain.
On solar rhythms migrating herds of animals, the reproduction of viruses and bacteria.
Studies in recent years
The sun has always attracted the attention of scientists, currently watching him through a special binocular telescopes. The most accurate data on a celestial body receives from satellites or space ships, which is a miniature Observatory.
From the very beginning of space exploration was launched the spacecraft to study the sun. The first was the United States satellites launched in the early 60-ies. In Germany in 1976 was launched, the Helios-2, approached the star of 0.29. E. (1. E. — 150 million km).
In 1990, the Ulysses probe went into solar orbit and made to orbit the Sun eight years after the start. It was discovered that the object is constantly increasing in size and has the shape of a magnetic field in a spiral.
NASA plans to launch Solar Probe Plus, which should be close to the star at a distance of 7 times less than GELIUS-2, and go into a circular orbit. To protect equipment from radiation and high temperatures will be screen-reinforced fiber-based carbon.
The planned Solar Probe Plus speed — not less than 200 km/s, it will be the fastest object created by man in space (speed of Helios -2 three times less).
Scientists-astronomers claim that the Earth is due to the increase in temperature in the Sun must soon die. Especially should not be afraid, it will occur not less than in 4 billion years, and during this time the scientists will help to find a new home on some habitable planet in a neighboring galaxy.