In a few billion years, our sun is going to turn into a massive red giant. What does that mean for us, and for our solar system?
Dying Star Offers Glimpse of Earth's Doomsday in 5B Years
"L2 Puppis is a dying star that once resembled our sun and it is showing us the stellar inferno that lies in store for our planet."
Red Giant Stars: Facts, Definition & the Future of the Sun
"A red giant star is a dying star in the last stages of stellar evolution. In only a few billion years, our own sun will turn into a red giant star, expand and engulf the inner planets, possibly even Earth."
"During most of a star's lifetime, hydrogen nuclei fuse together to form helium nuclei. As the star runs out of hydrogen, other fusion reactions take place forming the nuclei of other elements. Heavier elements than hydrogen and helium (up to iron) are formed. Elements heavier than iron are formed in supernovas."