A main sequence does not do anything - it is just a name for a period in a stars life. [See related question]
Main Sequence
The sun is a main sequence star
its to the right of the middle of the main sequence.
There are billions of stars that are not on the main sequence.
No. They have the lowest temperatures on the main sequence. The hottest main sequence stars are blue.
Off the Main Sequence was created in 2005-11.
Off the Main Sequence has 738 pages.
Unfortunately, it is impossible to tell accurately where a star is on the main sequence.
The temperature of main sequence stars can vary quite a bit.
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.
Most of the stars in the universe are found on the main sequence. Stars fall off the main sequence when they begin to die.
No. Red giants are not on the main sequence.