How is the protostar formed?

Question

how is the protostar formed?

Answer 1

Stars are created from clouds of gas and dust.The cloud spins and the material inside condenses and splits to form smaller clouds.These in turn spin and condense.Each is a protostar,a star in the making.Once the material in the core of a protostar has reached a critical density and temperature,nuclear reactions start and energy is produced.Now the star is born.As the energy reaches the surface,the star shines.The stars created from the original large cloud make a star cluster.

Answer 2

Hey.....really a good question....!

A protostar is a large object that forms by contraction out of the gas of a giant molecular cloud in the interstellar medium. The protostellar phase is an early stage in the process of star formation. For a solar-mass star it lasts about 100,000 years. It starts with a core of increased density in a molecular cloud and ends with the formation of a T Tauri star, which then develops into a main sequence star. This is heralded by the T Tauri wind, a type of super solar wind that marks the change from the star accreting mass into radiating energy.

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Answer 3

The dictionary defines a protostar as a hypothetical cloud of dust and atoms in space believed to develop into a star. Astronomers are fairly certain of their existence. A protostar is formed about a million years after a gas clump from an interstellar gas cloud has started to rotate and form a disk. The protostar is simply the core of the disk that formed from the clump of gas that was compressed inside the gas cloud.

The protostar is hotter than the gas it condensed from yet is still cooler than ordinary stars. The low temperature makes the protostar visible only to infrared and radio wavelengths. This low temperature doesn't last long as the protostar grows hotter because of the gravitational energy released by infalling matter.

When the protostar reaches about seven million degrees Kelvin, nuclear reactions begin in its core, and eventually enough pressure is built up to prevent any further collapse. Surrounding material continues to fall on the young star for millions of years. In fact, the star gains more energy from infalling material than the nuclear reactions in its core.

These stages take a few million years in stars like the Sun and even less time in more Massive Stars. In all stars the infall creates violent changes in brightness as well as an unexplained outflow of gas.