Hydrogen fusion is the main energy source in any star.
Put very simply, four Hydrogen atoms fuse to create Helium. The atomic weight of Helium is slightly less than four Hydrogen atoms the extra mass is released as energy.
Fusion of hydrogen into helium.
Algol is a blue main-sequence star in the constellation Perseus
Polaris - the current North star is a multiple star system., consisting of the main star and smaller companions. The main star Alpha Ursae Minoris is a bright star, a 6 solar mass supergiant and it is a main sequence star. Orbiting very close to this main star is a white dwarf of roughly 1.5 solar masses. This is not a main sequence star. Orbiting further out is the third companion, a 1.39 solar mass star. This is a main sequence star. There are also two more distant components (α UMi C and α UMi D) - Polaris is thought to be part of an open cluster - I do not know if these later two stars are main sequence or not.
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.
Radiant and gravitational Energy.
Unfortunately, it is impossible to tell accurately where a star is on the main sequence.
That the star has stopped fusing hydrogen in its core as its energy source.
Nuclear fusion starting with hydrogen.
quasar
by it self, they create & produce their own energy just like the sun
No, it is not source of any energy as it is a planet not a star.
The energy source is hydrogen undergoing nuclear fusion to helium. The time that lasts depends on the mass of the star but it usually takes a few billion years.
A main sequence star burns hydrogen to helium. Once a main sequence star exhausts all of the hydrogen, it begins to expand and burn helium causing if to become a red giant.
nuclear fusion
nuclear fusion
Hydrogen
well htey get there energy from burning the gasses that it is made of like our sun
The sun, center of our planetary system and star of the milky way galaxy (our galaxy), is the source of the energy that is processed and consumed by living beings. Intense nuclear reactions in the sun liberate light and other energetic radiations into the surrounding space. Some of this energy reaches our planet