The universe and stars
Millions, if not billions, of years, the universe was one huge hydrogen cloud that originated in a cataclysmic explosion. And inside of this cloud was something wonderful happened – due to shock waves from the big Bang to the cloud arose vortices of hydrogen. These huge clouds of hydrogen coalesced into “clots”. But over time more and more hydrogen is attracted in huge gas balls. Increasingly being warmed up and spinning, these balls, in the end, reached such high temperatures that broke out. Thus was born the first stars.
The universe created hydrogen. Hydrogen made stars. And the stars created the elements we need for life is calcium for our bones, the oxygen in the air… In the interior of stars hydrogen is converted into helium, which turns into carbon, then nitrogen, oxygen, silicon, iron… Everything we see around us was once inside a star, and every atom was formed inside a star. And everything on which to build life on Earth were formed inside stars – huge boilers, where cooks is the stuff of life.
The only problem is that these all formed in stars, chemical elements do not bring any benefit while they are inside the star. But, fortunately, from time to time, the stars explode! A huge star that exploded several billion years ago made it possible for our lives. The star ran out of hydrogen fuel. And nuclear fire, supporting her burning millions of years, is gone. And, as far as cooling, star decreases.It will start to collapse under its own weight. It collapses inward and explodes. Such a star is called a supernova. Its explosion is so bright that it outshines even the entire galaxy. While away billions of tons of celestial substances, which circulate the chemical elements, bearing life.
Dying star consists of layers similar to the layers of the bulb. And the outer layers are the remains of the gas supplying the fuel star is mostly hydrogen. But deeper are the layers of calcium, sulfur, carbon… In the center of a dense core of molten iron. The explosion throws the same elements that were formed inside the stars, out building blocks of life are scattered. They fly all over the galaxy. And some of them create new stars, solar systems, planets.