it will stay a red giant for a couple of million years
The sun's red giant stage will last for 1 or 2 billion years.
A red giant star can last for tens of millions to billions of years, depending on its initial mass. The more massive the star, the shorter its lifespan as a red giant. After this stage, the star will eventually shed its outer layers and evolve into a planetary nebula.
The sun cannot explode. It will last for about 5 billion years before becoming a red giant.
Some will last around 4.5 billion years - until the sun becomes a red giant and effectively swallows the Earth.
A star that is in it's teenage years(medium star) isn't a red giant until it's last years.
A red giant star.
up to 25 years
It is iron.
The sun will be a red giant for about 1 billion years before transitioning into a white dwarf.
You could see it last year. Betelgeuse is one of the brightest stars in the sky, and has been for a long time.
Red stars are usually giant stars that are on the brink of death. It is said to be on its last stages of stellar evolution.
Red giants are so named because they appear predominantly red in color due to their relatively cooler surface temperatures compared to other stars. The color of a star can indicate its temperature and age.