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.
None of those is a main sequence star.
Yes, the sun is a main sequence star. Main sequence stars are those, like the sun, that are fusing hydrogen into helium in their cores. This is the main stage of a star's life cycle when it is in a stable state.
A neutron star is a stellar remnant
main sequence
The Sun is a medium mass star in main sequence.
The nearest star that fits the description of being a G2V class yellow dwarf and a main sequence star like our Sun is Alpha Centauri A. It is part of a triple star system located about 4.37 light-years away from Earth, making it the closest star system to our solar system.
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.
The sun is a main sequence star, so 1 AU.
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.
None of those is a main sequence star.
The defining characteristic of a main sequence star burns hydrogen to helium in its core.
Algol is a blue main-sequence star in the constellation Perseus
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.
Any star that it fusing hydrogen into helium is classed as a main sequence star.
main sequence star