they become super novas and explode
This will happen when the star starts to run out of hydrogen fuel.
After the sun runs out of fuel is will become a white dwarf, a neutron star, or a black hole.
Most stars will become white dwarf stars. A "high mass" star will become a neutron star or a black hole, after exploding as a supernova.
The way a star burns it's fuel does in fact change it. The star will die when the fuel becomes too dense depending on the size of the star. For instance, if our sun was full of lead, it would explode, and we would cease to exist.
It happens when a star 8 times bigger than the sun(if the star is bigger it uses up more fuel/hydrogen)starts to run out of fuel and turns helium into heavier elements and when it finally reaches iron it collapses and turn into a neutron star, then a black hole.
When the star runs out of fuel.When the star runs out of fuel.When the star runs out of fuel.When the star runs out of fuel.
Such a star will first have a supernova explosion, due to instability in the nucleus. Then it will most likely turn into a black hole.
A neutron star is already the remains of a massive star that has run out of fuel.
The answer depends on the original mass of the star. If it was not too massive, it will shrink to a dwarf star. If it was sufficiently massive, it will explode as a nova. A really massive star, exploding as a supernova, will leave behind either a neutron star, a pulsar or a black hole.
Neutron stars do not have fuel. A neutron star is a remnant of a star that has already died.
On Xmas Eve one has to spot the first star on the sky - it's a signal to start the celebration.
a dwarf star