HOW THE UNIVERSE WORKS: Black Holes02:45
Black holes are the monsters of the universe. These terrifying cosmic beasts can devour all they encounter. Scientists believe that black holes are born in some of the brightest explosions in the universe — rising from the corpses of detonated stars — many times larger than our Sun. A star that burns for 10 million years will collapse to form a black hole in a period of seconds, and as it collapses the outer region of the star hits the core triggering a huge explosion called a supernova. While we can see this enormous explosion — we are unable to see what is left behind.