Stars are born. This time in the life of a Red Giant is very short compared to the main sequence lifetime, only a few million years. The red giant forms from a main sequence star; hydrogen reduces as hydrogen atoms fuse together. Massive Red Supergiant.

Star life cycles. At this point, the star can contract in on itself during periods of slow fusion, and then become a blue supergiant. The red giant star has a mass like out sun. White dwarf is the most common answer if you are thinking of the red giant as the entire time a star swells to more than its main sequence size. This results in the star rapidly expanding and cooling, therefore turning much redder.

It's not uncommon for such stars to oscillate between the red and blue supergiant stages before eventually going supernova. A shell around the core will rise to such a temperature as to ignite further hydrogen fusion in that region of the star. This is the main cycle which will then in its later life cool and turn red and grow. The red giant star is the third stage of the life cycle of a star The red giant star is born when the fuel of a main sequence star runs out and then the star blows up into a massive red giant star destroying everything in its path for example when the sun runs out of fuel it will become a red giant star destroying everything up until Jupiter. This time in the life of a Red Giant is very short compared to the main sequence lifetime, only a few million years. They live, age and then die.

Every star is born from hydrogen in a cloud pulling itself in and increasing in temperature causing nuclear fusion. Stars will convert hydrogen to helium to produce light (and other radiation). This causes the outer layers of the star to expand and cool, similar to the process that occurred after the star ran out of hydrogen fuel and left the main sequence. The helium produced falls onto the core where it can be used as fuel. The helium produced falls onto the core where it can be used as fuel. When star like our Sun reaches the end of its life, it enters one last phase, ballooning up to many times its original size. The Life Cycle of a Star: Home; Nebula; Protostar; Main Sequence Star; Red Giant; White Dwarf; Supernova; Black Holes ; A star is an extremely hot ball of gas, with hydrogen fusing into helium at its core. Red Giant The following stage of a star's life cycle involves the hydrogen fuel at the centre of a star to become exhausted causing a shell of nuclear reactions to move outwards into its atmosphere. Antares is a red supergiant star that is nearing the end of its life. Then depending on the stars mass it will either:

After a helium-burning red giant runs out of helium fuel in its core, the star's core starts to collapse and heat up.