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As the gases in a protostar begin to collapse, the central core begins to heat up due to pressure. As more gases are absorbed, the greater the pressure. Once the temperature of the core reaches 10 million degrees K, hydrogen fusion begins, and the star begins it's life on the main sequence.
The star will stay on the main sequence whilst it still has hydrogen to fuse. Once all the hydrogen has been used, the star will drop out of the main sequence.
Protostar stage in the stellar evolution. [See related question]
What else can I help you with?
How does the protostar stage of a star's life cycle compare with the main-sequence stage?
A protostar generates energy by friction whereas a main sequence star generates energy by fusion.
How does the protostar stage of a stars life cycle compare with the main sequence stage?
A protostar generates energy by friction whereas a main sequence star generates energy by fusion.
When did the first star form?
The actual FIRST STAR is impossible to say when it existed. In the normal evolution of a star it becomes a protostar first. The life of a protostar is about 150,000 years before it becomes a main sequence star. But in the Early universe it is hard to say what was happening. They could have formed in days weeks months or even hours.
When does the protostar become balanced?
A protostar becomes balanced when the gravitational forces pulling matter inward are balanced by the outward pressure due to nuclear fusion at its core. This marks the transition from a contracting protostar to a stable star in the main sequence phase of its lifecycle.
Will a star spend most of its life as a protostar?
No, it will spend most of it's life as a main sequence star.
What are the stages of a medium sized star?
Protostar, Main Sequence, Red Giant, Super Nova, and the Neutron Star.
When does pro-to star become a star?
I actually thought that would be when the star starts fusing hydrogen into helium... But apparently there are other stages between those two.According to Wikipedia, "[The protostar phase] ends when the protostar blows back the infalling gas and is revealed as an optically visible pre-main-sequence star, which later contracts to become a main sequence star."Pre-main sequence means the star is not yet on the main sequence; and that, in turn, basically means that it is not yet fusing hydrogen into helium.
Is the sun a protostar?
No, the sun is not a protostar. It is a mature star that is in the main sequence phase of its life cycle, where it fuses hydrogen into helium in its core. A protostar is a young star that is still in the process of accumulating mass and contracting before it begins hydrogen fusion in its core.
What is the correct life sequence of a star?
The correct life sequence of a star starts with a protostar, which forms from a dense cloud of gas and dust. The protostar then evolves into a main sequence star, where it fuses hydrogen atoms to form helium in its core. Depending on its mass, the star will either become a red giant or a supergiant before eventually shedding its outer layers to become a white dwarf, neutron star, or black hole.
What was the early form of the sun called?
Before becomming a main sequence star, our sun would have been a protostar. A protostar is where there is a large gathering of contracting gas. Matter falls into a central condensation, when the surrounding gas/dust envelope disperses and the accretion process stops, the star moves towards becoming a main sequence star.
When a star is fully formed it becomes which type of star?
A Main Sequence star.
What is the step after main sequence in a stars life?
After the main sequence, a star becomes a red giant.
