a red giant
White Dwarf
no, as a hydrogen burning main sequence star.
It is a main sequence star of class M. It can range in size form 0.08 to 0.45 solar masses, and a radius of less than 0.7 times that of the sun. A majority (76%) of main sequence stars belong to this category.
The name for a middle-aged stable star is a "Main Sequence Star" FROM TERI EMMA AND JASMINE. partly olivia. in her mind. :) kngs. in ict1 (physics.) ;)
A main sequence star is a star that is fusing hydrogen in its core. Stars leave the main sequence when they run out of hydrogen and start to fuse heavier elements (starting with helium and finishing with iron). The length of time a star remains on the main sequence depends on how massive the star is. The larger the star the more gravity it has and the tighter this gravity squeezes the core - this makes the core hotter and brings the hydrogen atoms closer together so the fusion process proceeds more rapidly. Thus big stars will only spend a few tens of millions of years on the main sequence while stars the size of our sun will spend ten thousand million years on the main sequence, and smaller stars (red dwarf stars) will spend trillions of years fusing hydrogen.
The main reason that the HR Diagram is so useful and important to scientists is, you can tell the size of the star by plotting it on the HR Diagram. The different sizes of stars form a pattern on the HR diagram.
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 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.
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.
Main Sequence .....Have fun with the rest of Study Island Suckers :D
When a star is in the Hydrogen burning phase it said to be a Main Sequence star.
planetary
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.
This happens when a main sequence star uses up all of its fuel and swells. Next stage: Red Giant.
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.
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.
No. Red giants are not on the main sequence.
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.