What are the stars?
Each of us at least once, but admired the beautiful night sky, strewn with many stars. Have you thought about what the stars are made of, what is the secret of their eternal radiance?
What is a star, and what does it consist of?
A star is a huge celestial gas body in which thermonuclear reactions take place. The temperature on the surface of the star reaches thousands of kelvins, and inside it is measured in the millions.
Initially, the composition of the star is similar to the composition of interstellar matter. Further, the composition can be used to judge the nature of interstellar space and the thermonuclear reactions that occur in the body of a star during its development. Knowing the chemical composition of the star, you can accurately determine its age.
The celestial body itself consists mainly of helium and hydrogen. Also in the composition of some stars are oxides of titanium and zirconium, such radicals as CH, CH2, OH, C2, C3. The upper layer of the star consists mainly of hydrogen: an average of 10 thousand hydrogen atoms per 10 thousand hydrogen atoms - oxygen and less than 1 atom of some other elements.
There are stars in which the content of some chemical elements is greatly increased. For example, there are silicon stars (with a high content of silicon), iron, carbon. In relatively young stars, a high content of heavy elements is often found. In one of these celestial bodies found the content of molybdenum, 26 times higher than its content in the sun. The greater the age of the star, the less the content of elements in it, whose atoms have a mass greater than that of helium atoms.