Mid-life cycle of stars

   Among the emerging stars found a huge variety of colors and sizes. By spectral classes ranging from hot to cold blue-red mass - from 0.08 to more than 200 solar masses. Luminosity and color of stars depends on the temperature of its surface, which, in turn, is determined by weight. All new stars took the place in the main sequence according to their chemical composition and mass. It is not a physical movement of the star - only about her situation at that figure, depending on the parameters of the star. That is, it is, in fact, only to change the parameters of the star.

   Small, cool red dwarfs burn slowly reserves of hydrogen and remain on the main sequence of hundreds of billions of years, while the massive supergiants will leave the main sequence after a few million years after formation. This is exactly.

   Medium-sized stars like the sun, remain on the main sequence, on average, 10 billion years. It is believed that the sun is still there, as it is in the middle of its life cycle. Once a star exhausts the hydrogen supply in the nucleus, it leaves the main sequence.