How to blow up a star?

Blowing up a star is like giving a balloon a really strong shake until it bursts.

Stars are like giant hot balloons made of gas, mostly hydrogen, which is the same stuff that's in your water bottle or your soda. They shine because they're doing a special kind of dance inside: hydrogen atoms are joining together to make helium, and this creates energy, like fire.

Now, imagine you have a balloon that’s full of hot air, it's bouncing around happily. But if you start shaking it really hard, or giving it too much heat, the pressure inside gets so high that eventually, pop!, it explodes.

That’s what happens to stars when they run out of fuel or get too big and heavy. They start shaking a lot inside (we call this a supernova) and then they burst, sending out light, energy, and pieces of themselves flying into space, like confetti from a really big party.

Sometimes, after the explosion, new stars are born from that leftover stuff, it’s like making a new balloon from the pieces of an old one.