What are the different types of stars?

Most stars fall into the categorization class called the main sequences, also known as dwarf stars. In a standard chart, it portrays the color of stars against size, known as Hertzsprung-Russell Diagram, the main sequential stars form a coherent curve, unlike other categories-white dwarves, subgiants, giants, bright giants and supergiants. Although not usually included in the chart, black holes that are gravitation -collapsed stars could be considered as points on the graph with zero luminous intensity and spectral signature 0 ° K. 158 Solar on 158 solar. White dwarves, stars that have exhausted their nuclear fuel, have similar spectral signatures as the main sequential stars, but much less luminosity. This is because the elements do not move or have a continuing source of energy - their lumnehozi and heat is the remaining. In the course of billionsThe flight is expected that white dwarves will cool down and become black dwarves or inanimate stars Hulks. But no white dwarf has been long enough to make it happen. The red dwarves are slightly warmer and more energetic, with more matter; This is followed by yellow dwarves, very common stars, an example of which is our sun.

When the stars burn all nuclear fuel in the form of hydrogen, they begin to combine helium. Because old stars begin to create a solid core of the fused material, powerful gravitational forces on the perimeter of the core compress the gas layers above, accelerate fusion and increase luminosity and size. Through this development route, dwarf stars become giants. Depending on their matter, they eventually collapse into white dwarves, neutron stars or black holes. Massive stars cause supernova, which are huge explosions of energy that escape when the merger stopsThey wipe strongly in the star core and gas layer during the final collapse.