sun warms and illuminates our planet.Life on it would be impossible without the energy of light.This also applies to the person and to the entire earth's flora, fauna.Sun energizes all the processes occurring on Earth.Earth receives from the sun is not only light and heat.In the life of our planet continuously affect the fluxes of particles and various types of solar radiation.
sun exposure greatly affects human health.Magnetic storms cause many people feel worse.
This article will review general information about the Sun, namely the composition, temperature and the mass of the Sun, the impact on the Earth, etc.
General
Sun - the star closest to us.Research Sun provide information on the conditions of the reactions occurring in its interior and on the surface, allow us to understand the physical nature of stellar bodies, which we see as a dimensionless point flashing.The study of the processes occurring in the surrounding area and on the surface of the sun, helps to understand the phenomena characteristic of near-Earth space.
sun - the center of our planetary system, which also includes the 8 planets, dozens of moons of the planets, thousands of asteroids, meteoroids, comets, interplanetary gas, dust.In the solar system the mass of the Sun takes 99.866% of the total weight.In astronomical terms the distance from the Sun to the Earth is small: the light is just 8 minutes.
size of the Sun requires special attention.This is a huge, not only in size but also in terms of the star.Its diameter is greater than the diameter of the Earth 109 times, volume, in turn - 1.3 million. Times.
approximate surface temperature of the Sun - 5800 degrees, so it shines almost white light, but because of the strong absorption and dispersion of short-wave part of the spectrum of the Earth atmosphere in direct sunlight near the surface of our planet receives a yellow tint.
temperature in the central zone of the Sun comes to 15 million. Degrees.Because of the relatively high temperature solar matter is in a gaseous state, and in the bowels of a giant star atoms of chemical elements are divided into freely moving electrons and atomic nuclei.
mass of the Sun - 1.989 * 10 ^ 30 kg .This figure is greater than the mass of the Earth in 333 thousand. Times.The average density of matter equal to 1.4 g / cm3.The average density of the Earth above the almost 4-fold.In addition, there is a concept in astronomy mass of the Sun - a unit of measurement of weight that is used to express the mass of stars and other objects of astronomy (galaxies).
gaseous solar mass is held by a general attraction to the center.The upper layers of its weight compressed the deeper and with increasing depth of the layer of pressure increases.
pressure in the interior of the sun reaches the hundreds of billions of atmospheres, so the stuff in the depths of the sun has a high density.
This leads to thermonuclear reactions in the solar interior, resulting in hydrogen is converted into helium, releasing nuclear energy.Gradually this energy "leaks" through non-transparent solar substance, first into the outer layers, and then radiated into space.
The composition of the sun includes elements such as hydrogen (73%), helium (25%) and other elements in a much lower concentration (nickel, nitrogen, sulfur, carbon, calcium, iron, oxygen, silicon, magnesium, neon, chrome).
