What is hydrogen burning?

hydrogen combustion is a process that takes place in every star, with hydrogen cores joining into helium at high temperatures and pressures. It is the most common type of process known as star nucleosynthesis. After a large bang, the universe consisted of approximately 75% hydrogen and 25% helium. Today, proportions are not so different, but there are new elements - the universe is about 74% hydrogen, 24% helium and 2% of other elements. These other elements, the most common are oxygen (1%), carbon (0.4%), neon (0.1%), iron (0.1%) and nitrogen (0.1%) are all star nucleosynthesis products - synthesis of heavier elements in star cores. Elements heavier than iron are formed in supernova. They are called H II regions or star kindergartens. Finally, a high concentration of matter appears in the area around the size of our solar system. This is called the side of the globule. When the pressure and pressure in the center reaches a certain level (about 10 million degrees of Kelvin), hydrogen ignition occurs and a huge amount of heat and light is formed. This is the birth of a star.

When the star is involved in hydrogen burning, it is reportedly on the main sequence and is called a dwarf star. Our sun is a yellow dwarf. The main sequential stars are the most common stars in the universe, mainly because of the time during which hydrogen is burned. Only a small percentage of core core core is fused to helium annually. If the hydrogen burned quickly, most hydrogen would already be consumed nuclear reaction and converted into heavier elements, which would cause water formation (H _{2 o) - and therefore difficult, not if impossible.}

The way the star evolves after its creation on its mass. The more massive the star, the faster it burns fuel. For the smallest stars, hydrogen burning is usually completed for several million years and the next step - Helia burning begins. Stars like our Sun is expected that the hydrogen combustion phase will last nine billion years. In the stars with deseTina sun mass can take hydrogen burning as long as a trillion for years! Such stars are significantly cooler than our sun.