The formation process is triggered when one or other reason, there is a “fragmentation” of the cloud, it breaks into pieces with sufficient density ratio between the amount of mass and volume occupied to begin to shrink slowly. This event is the core of the star: The protostar, still fall on the rest of the field of the fragment cloud.
As material continues to decline in the protostar, it begins to turn, press jets of matter (such as water heaters), large distances and high speeds, which runs the protostar is not too fast, which can lead to decay.
This first phase of star formation takes about 100,000 years, and if it obscured by the dust cloud. We must, as already mentioned, radio telescopes (recording the emitted radio waves) or to detect infrared telescopes at that stage. Then, if the material falls onto the protostar and fragment shell of gas and dust cloud disappears, the embryo is visible. In a sun-like star, this is one million years after the beginning of the process from collapse.
A new star
Terminate after 10 million years, until the first contraction process of collapse due to gravity. During this time the temperature has increased the protostar and the temperature so high that when the collapse ends to take the thermonuclear reactions start with hydrogen as fuel in the core of the star, making it a heavier element called helium.
The star is stable because it is known as hydrostatic equilibrium: the force that pushes outward (the pressure of the energy produced by nuclear reactions) is compensated by the inward force of gravity pushes.
Posted in astronomy | Tags: birth of a star, core center, dark clouds, dark regions, density ratio, distance from the sun, electromagnetic spectrum, infrared waves, luminous phenomenon, molecular clouds, nearest star to earth, observing the night sky, restless spirit, star clusters, supernova explosion
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