Its initial mass. There are other factors (e.g. whether the star is in orbit around another star) but mass is by far the most important.
Generally low mass stars live long unexciting lives, whilst high mass stars live short lives and experience violent stages in their evolution such as supernovae and the swelling into red giants.
How the star looks when it is born.
100 billion,million zillion years
its mass
Kinds of 'fuel' and the mass and the stars determines how it dies. If it is large enough, it will create a Neutron Star or a Black Hole; if it is some size close to our sun, it will become dwarf planets.
How does a star form and what determines its lifespan?Read more: How_does_a_star_form_and_what_determines_its_lifespan
Mass, and mass. It's really the ONLY thing that counts.
The temperature determines the color of the star!:)
Its Mass.
Its mass.
The mass of the star
The color of a star determines the heat of the star. For example; a white dwarf star does not produce nearly as much heat as our sun does. However, one day, our sun will turn into a white dwarf star. When this happens there will not be enough heat to live on Earth.
The mass of the star.
its mass
Fire
MASS