What will happen when our sun dies? Scientists agree the sun will die in approximately 10 billion years, but they weren't sure what would happen next… until now. Astronomers predict it will turn into a massive ring of luminous, interstellar gas and dust, known as a planetary nebula. Source 6i.
When our sun dies then all life on this planet will die with it. The sun is the giver of life here on earth. The trees need water as does all plants as many of the animals need water and sunlight. Without the sun and liquid water plants would die and then oxygen would cease and all life will be gone.