life cycle of a star

Question 1

What are the stages of a star like our sun

Answer 1

nebula
protostar
main sequence star
red giant
white dwarf
black dwarf

Question 2

What are the stages of stars bigger than our sun

Answer 2

nebula
protostar
main sequence star
red super giant star
supernova
neutron star or black hole

Question 3

Describe each stage of a life cycle of a star

Answer 3

A cloud of dust, rock and gas will form a nebula.
gravity causes fusion reactions, turning the nebula into a protostar.
The protostar will turn into a main sequence star, through fusing hydrogen nuclei into helium nuclei.
the main sequence star will carry on undergoing fusion until hydrogen runs out in the core. This is where our sun is at.
The main sequence star will turn into a red giant as the surface cools. During this time, heavy elements are formed in the core
The red giant becomes unstable and fusion stops
The star becomes smaller and smaller until it becomes a white dwarf
which is the dense core

The white dwarf emits energy in the form of light. Overtime, the white dwarf emits less energy and gets called a black dwarf