Initially it is a question of how much material was present in the disk that collapsed to form the star. Subsequently, it may be affected by collisions with nearby stars.
A star's entire fate is tied into its initial mass. Nothing else matters.
The mass of a star primarily determines its size. Stars with greater mass will be larger, as there is a balance between internal pressure from nuclear fusion and gravity pulling the star inward. Higher mass stars have more fusion reactions occurring in their cores, creating more pressure to counteract gravity and resulting in larger sizes.
How does a star form and what determines its lifespan?Read more: How_does_a_star_form_and_what_determines_its_lifespan
The temperature determines the color of the star!:)
Whether a star will become a neutron star is determined by its mass. Generally, stars that are more than 8 solar masses (have a mass that is more than 8 times that of our Sun), but are less than 15 solar masses will become neutron stars when they die.
Its Mass.
The difference between the death of a small star and a massive star is what the become afterwards. A small star will typically become a red dwarf while a large star will become a neutron star or a black hole.
During last ages of life of a star, to find what happens in coming ages of life of star. It determines on its mass explained by chandrashekher that if the mass of given star is 2.42 times the mass of our sun then it explodes in the form of supernova. If the mass of given star is less than the 2.42 times the mass of our sun then it shrinks to become white dwarf.
It is a large star
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.
The mass of the star.
MASS