For modern ideas stars are formed due to gravitational compression of fragments of gas and dust clouds. Studies show that existing in the interstellar medium of gas - dust complexes whose masses reach 103 .. 104 m, size 10. 100 pc, and temperature of several tens of degrees Kelvin, is gravitationally unstable and they should be compressed. In this part of the energy goes into heating the substance. If you get more information, visit our site: BEST ESSAY CHEAP
