Every second, a star dies in the universe. But these stellar beings don't just completely vanish, stars always leave something behind.
Some stars explode in a supernova, turning into a black hole or a neutron star. These are the most dangerous things in nature. Black holes suck in everything including light making then scary in themselves, with the occasional eruption of energy from its "poles", but neutron stars, especially pulsars, are even more dangerous as they constantly throw off radiation. It can be so powerful that if it hits the earth directly, it would decimated the ozone and destroy the magnetic field protecting us. This would essentially kill the planet as its pounded by our sun's radiation.
However, the majority of stars, around 90%, will become white dwarfs, a core of the star it once used to be. These in themselves are remarkable because of what they truly are. Our own sun will become a red giant when it runs out of hydrogen and burns helium, and when that burns off it will become a white dwarf made completely of carbon core about the size of the earth. It will literally become a diamond in the sky. The condensed carbon core will become a 10 billion-trillion-trillion carat diamond.
10,000,000,000,000,000,000,000,000,000,000,000 carats
Now a new study reveals that these white dwarfs contribute more to life in the cosmos than previously believed. Before they burn out all its energy, it spews carbon atoms out into space that travel across the cosmos until they fall down onto a planet. When that planet is the right distance from a star like our own. These carbon atoms can become the building blocks to life on that planet. It used to be thought that supernova stars were what created life, but it turns out that the quiet more common and subtle death of smaller stars, may be the reason we are here. Created by stardust.