How does a star die

The universe has massive clouds of hydrogen floating around. Sometimes, these clouds come together and form very dense and huge balls of hydrogen gas. As the clouds come close, their temperature increases. This is called a proto-star (original star). The increase in temperature triggers off nuclear reactions at the core of the star. Nuclear reactions inside the star occur when the nucleus of two hydrogen atoms fuse to produce a helium atom. This reaction which is actually the same as that inside a hydrogen bomb, release huge amounts of heat and light. This is what makes a star glow.Our sun is also a star and the heat and light we see is actually the burning of the hydrogen fuel in its heart.Like all things that are born, a star also dies. It dies when it runs out of fuel. It is a little like a car without petrol. But, the petrol tank in a car can be refilled. The star usually does not get a refill.And the death of a star is much more dramatic than a car without petrol. Everything that is born must die. Not only living beings, but inanimate objects like stars too. Ajay Dasgupta