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Main-sequence,red giant,white dwarf.
The Main Sequence stage.
Red Giant
The main sequence phase means that, if you plot an H-R (Hertzsprung-Russel) diagram, it is in the so-called "main sequence", the area in the graph where you find the majority of stars. Those are the stars that currently fuse hydrogen into helium.
Because there not that hot
a red giant
main sequence,giant then nebula
Main-sequence,red giant,white dwarf.
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 Main Sequence stage.
No. Red giants are not on the main sequence.
After the main sequence, a star becomes a red giant.
No. The Sun is a main-sequence star. It will not be a red giant for another 5 billion years.(see related link for an image of what the Sun would look like in its red giant phase
red giant
The "main sequence".
red supergiant
Red Giant