At this point, the opinions of the majority of astrophysicists agree that the star formation occurs at the expense of gas and dust accumulations. The impact of gravitational forces on the interstellar cloud leads to a confrontation between the forces of compression and expansion. The expansion contribute to the magnetic field and the internal pressure of the clouds, on the other hand its own gravity of a heavenly body, and the influence of the external environment.
However, the outside light opaque cloud is received, and additional heat loss of molecular infrared radiation. According to this, the temperature in the dense part of the cloud is reduced to the level of -270 degrees, which inevitably leads to a pressure drop. This area begins to shrink rapidly, as a result of the dominant and the tighter the compression process. Further already warmed gas cloud allocates huge amounts of energy. This is because the internal pressure and the temperature increased to the point where a future star nucleus fusion reaction mechanism starts to merge hydrogen atoms.
References.
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Article: сезоны-года.рф
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