Death of the Sun and stars
Professor Brian Cox explains how stars die. Stars are only able to survive as long as they have a supply of hydrogen to burn. But all stars will eventually run out and then die.
Our star, the Sun, will run out of fuel in about a billion years. At this point, the Sun will become a red giant, as the core collapses and the outer layers expand. This will cause the Earth to become superheated, destroying any remaining life.
After about six billion years, this red giant will explode to form a massive nebula with a dim white dwarf at its core. This fate is the same for all stars in the cosmos.