The biggest star - VY Canis Majoris IS in a red supergiant phase and will explode as a massive supernova.
Near the death of a star, the star swells and this phase is known as red giant phase.
super giant.
The answer to this question is yes. It can vary, but not very much. Yet, the red giant is the coolest star.
Cygnus ob2 no.12, a hyper star is & also the biggest.
It is a star that has entered the super-giant phase. Its stellar classification is K2 1b.
a red giant
A star that is in it's teenage years(medium star) isn't a red giant until it's last years.
A typical star, as it gets older. This should happen to our Sun, eventually. When I say "typical star" I mean apart from the very numerous "red dwarf" stars.
The dying phase of a massive star begins when it runs out of usable hydrogen that it can convert to helium. Once it becomes a red giant, it slowly dies out.
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
When aÊstar completes it's Red Giant phase they become White Dwarfs. The Red Giant phase of stars takes about a billion years.
The giant star