A neutron star is a stellar remnant
A neutron star is a stellar remnant and is no longer on the main sequence. See related questions.
None of those is a main sequence star.
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If you refer to the diameter, a neutron is tiny - only 20-30 kilometers in diameter. In comparison, main sequence stars have a diameter of at least several hundred thousand kilometers.
Most stars are on the main sequence; that includes red dwarves. Specifically, in this case, the closest known star - Proxima Centauri - is also the closest main-sequence star.
A neutron star is a stellar remnant and is no longer on the main sequence. See related questions.
None of those is a main sequence star.
Protostar, Main Sequence, Red Giant, Super Nova, and the Neutron Star.
A main sequence star is what is considered a typical star. Such stars are composed primarily of hydrogen and helium. They produce energy by fusing hydrogen into helium in their cores. Main sequence stars vary greatly in mass and range from a few hundred thousand to a few million kilometers across. Our sun is a main sequence star of intermediate mass. A neutron star is the collapsed remnant of the core of a large star that was destroyed in a supernova explosion. A neutron star has a mass of about 2-3 times that of the sun compacted by gravity into an area less than 40 kilometers across, making it extremely dense. A neutron star is mostly composed of neutrons.
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If you refer to the diameter, a neutron is tiny - only 20-30 kilometers in diameter. In comparison, main sequence stars have a diameter of at least several hundred thousand kilometers.
The sun is a main sequence star whereas Polaris is a super-giant.
It's the size. A dwarf star has reached the end of the road and has collapsed. It's a little old star and people don't notice it, mostly.
matter in stellar nebula decides the life of star less amount of hydrogen results in average star more amount of hydrogen results in massive star Edit: A very brief summary of the two main star life cycles: Low mass stars (like our Sun): Main Sequence Star, Red Giant, White Dwarf. High mass stars: Main Sequence Star, Red Giant, Supergiant, Supernova, then either a neutron star or a black hole. (Red dwarf stars should just go straight to the white dwarf stage after their time on the Main Sequence.)
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.
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.