Here's how it works:
* Nebulae form: These clouds are made of hydrogen, helium, and other elements. They are often triggered by supernova explosions or the gravitational collapse of other nearby stars.
* Gravity pulls: The particles within the nebula start to attract each other due to gravity. As the cloud collapses, it becomes denser and hotter.
* Star birth: Eventually, the core of the collapsing nebula becomes so hot and dense that nuclear fusion begins. This is the process where hydrogen atoms fuse to form helium, releasing tremendous energy. This energy is what makes the star shine.
So, you can think of a nebula as the "seed" from which a star is born.
