"Our sun, for example, is currently burning hydrogen into helium in its core. When the hydrogen in the core is depleted, the sun will start burning helium into carbon and oxygen. When the helium also is gone from the centre, the sun will eject its outer layers into space in an event called a planetary nebula and the core will slowly contract and become a white dwarf," Caiazzo added.

Source: The Star July 22, 2023 17:16 UTC