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The main sequence phase means that, if you plot an H-R (Hertzsprung-Russel) diagram, it is in the so-called "main sequence", the area in the graph where you find the majority of stars. Those are the stars that currently fuse hydrogen into helium.
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What does it mean when a star goes off the main sequence?
When a star "goes off the main-sequence" it generally means the star has run out of hydrogen fuel and is beginning the post-main-sequence or its end of life phase. The main sequence of a star is the time where it is no longer just a proto-star but is burning hydrogen as a primary source of fuel.
When does a star become a main sequence star?
When the protostar accumulates enough mass and the pressure in the core reaches 10 millions degrees Kelvin. then hydrogen fusion can start and the star starts its main sequence phase.
Name an example of a main sequence?
The sun is a main sequence star
Why is Sirius not a main sequence star?
Sirius is not a single star but a binary star system consisting of a white main sequence star and a white dwarf.
Is a white dwarf considered a main sequence star?
No, a white dwarf is not considered a main sequence star. A main sequence star is a star that is still fusing hydrogen in its core. A white dwarf is the remnant of a low to medium mass star in which fusion has stopped.
What does it mean when a star goes off the main sequence?
When a star "goes off the main-sequence" it generally means the star has run out of hydrogen fuel and is beginning the post-main-sequence or its end of life phase. The main sequence of a star is the time where it is no longer just a proto-star but is burning hydrogen as a primary source of fuel.
What is the phase that occurs after a main sequence star?
a red giant
When does a star become a main sequence star?
When the protostar accumulates enough mass and the pressure in the core reaches 10 millions degrees Kelvin. then hydrogen fusion can start and the star starts its main sequence phase.
What is the longest phase of a star?
Main Sequence .....Have fun with the rest of Study Island Suckers :D
What is the name for the portion of a star's life cycle when it uses hydrogen for fuel?
When a star is in the Hydrogen burning phase it said to be a Main Sequence star.
When does the main sequence star phase of a star end?
The "main sequence" is the region (on the HR diagram) for stars which burn hydrogen-1. Once stars use up most of their hydrogen-1 (and have significant amounts of helium-4), they leave the main sequence.
At what stage in star development does a star spend most of its life?
A Star spends most of its life on the "main sequence" of the Hertzsprung-Russell diagram (see related link below). While here it is called a "main sequence" star and its source of energy during this phase of its life is the fusion of hydrogen into helium in its core.
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 a red giant star considered to be a main sequence star?
No. Red giants are not on the main sequence.
Does a red main sequence star have fusion?
A red main sequence star would be a red dwarf or a branch red giant. To be on the main sequence, you have to have hydrogen nuclear fusion.
Main sequence star distance from earth?
The sun is a main sequence star, so 1 AU.
Name an example of a main sequence?
The sun is a main sequence star
