The sun is the most common star.Age it almost five billion years.The solar surface is heated to 5000 degrees, but at the center of its temperature exceeds 13 million degrees.In the solar core is the process of converting hydrogen into helium, during which a significant amount of energy is released.On the surface of the sun has spots, bright flashes constantly taking place.

sun gives light and warmth of the Earth that support life on our planet.For plants, solar heat and light - a source of energy which is necessary for their growth.

For astronomers the Sun is a special star, as it is located very close to the Earth (150 million km.).That is why it is known for much more than on other stars.In the largest observatories have special telescopes, which are designed to study this great luminous stars.

Scientists believe that even the most minor changes in energy production will entail major changes in the climate, not only on the sun, but also in the world.

Numerous studies and observations have given man
kind a lot of information.The sun is a ball of fire.Its diameter is larger than the diameter of the Earth 109 times.Yellow light of this star is formed from the layer of the atmosphere.It has a thickness of 500 km and astronomers call it the photosphere.Above the photosphere is the transparent part of the outer atmosphere, and under it - the inner regions of the sun.Most of the energy that falls on the Earth comes from the photosphere, but made in the depths of the star.Photosphere temperature exceeds 5,000 degrees.

surface of the star bubble.These bubbles astronomers called solar granulation, and it can be seen only through a special telescope.Such blistering is very similar to the bubbles that arise in boiling broth or milk.

In the sixties, scientists have found that the uppermost layer of the atmosphere rises and falls every 5 minutes.That is why the Sun vibrates slightly, and this vibration, scientists are trying to learn the internal structure of the solar sphere.

It rotates as the Earth and other solid objects.The speed of rotation of the various parts of different stars.The fastest rotation makes the equator - it makes one revolution in 25 days.The rate decreases with increasing distance from the equator - in the polar regions one revolution can last up to 35 days.These differences stem from the fact that the sun is a ball of gas.

number of sunspots varies over time.From 1989 to 1990 there were a lot of - this is due to an increase in solar activity.The average number of sunspots reaches its peak about every eleven years.The cycle of sunspot activity is directly related to the climate of our planet.

The total solar eclipse total solar eclipse

Thanks solar eclipse can be seen the outer layers of the atmosphere, which are located above the photosphere.When a total solar eclipse, you can see the solar corona or white halo around the sun.Around the Sun its temperature may reach 2 million. Degrees, and it extends over a distance of a few stellar radii.Crown emits at least light, but it comes from the X-ray emission of enormous power.

All scientists are wondering how long the Sun exists?

clear that this star does not always exist, but in front of her for a long time "life."Currently it is in middle age.In the future time, this star will heat up and increase in size with a very slow speed.When, in the downtown core all the hydrogen is consumed, the Sun will increase three times and begin to die.This will ensure that all the oceans on Earth will boil away, and the planet itself from the hard rock will turn into molten lava.
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