All stars eventually run out of their hydrogen gas fuel and die. The way a star dies depends on how much matter it contains—its mass. As the hydrogen runs out, a star with a similar mass to our sun will expand and become a red giant.

Will all stars eventually die?

Eventually the cycle of star birth and death will come to an end. Gravity will have won, a victory delayed by the ability of stars to call on the resources of nuclear fusion. But ultimately, gravity will reduce all stars to a super-dense state as black holes, neutron stars or cold white dwarfs.

Do all stars live forever?

No. Stars are born, live, and die. This process is called the "life cycle of a star". Most of the time a star shines, it is in a stage of its life cycle called the main sequence.