It grows to such an extended size that it exceeds the standard dimensions of the page,
and a fold-out is required.
red giant star
The temperature of main sequence stars can vary quite a bit.
The HR diagram does not reference stars on their way to the main sequence, only during or after.
main sequence
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.
A red giant forms when a main sequence star that has been contracting suddenly expands and cools.
No, a red giant is a star that has just left the hydrogen burning main sequence and begun the next step, burning helium. As helium undergoes fusion at a much higher temperature than hydrogen undergoes fusion, the star expands dramatically and as it expands its outer layers cool to red heat.
Main Sequence Stars
In the past it was a main sequence star. In the future it will be a giant star and will cool off.
Helium builds up in the core, while the hydrogen burning shell expands.
Main Sequence
its to the right of the middle of the main sequence.
There are billions of stars that are not on the main sequence.
The sun is a main sequence star
No. They have the lowest temperatures on the main sequence. The hottest main sequence stars are blue.
The temperature of main sequence stars can vary quite a bit.
Unfortunately, it is impossible to tell accurately where a star is on the main sequence.