The most famous star is our own sun, it's common knowledge, but where does the sun come from? It cannot have appeared out of nowhere, and it cannot remain forever, because with every birth comes a death. Astronomers believe that molecular clouds, or large clouds of gas, are the primary source of star birth. Gravity compresses this cloud into a huge sphere of gas and dust, and once the temperature reaches 15 million degrees, it triggers nuclear fusion, it begins to glow and burn, and voilà! A new star is born! But how does nuclear fusion begin? Well, remember all that gas and dust at the center of mass? Well, as the temperature increases, the pressure also increases and the electrons are separated from the atoms, creating the plasma. The increasing heat causes the plasmas to move so quickly that they crash into each other and merge, and in doing so they release a large amount of energy which seeps out of the core and becomes electromagnetic radiation once as it reaches the outer layers of the mass of gas and dust causing the glow. So ! A new star is born! But not all ...