A Mystery of Space: S T A R S- [The Fate of Earth] U12

If you have watched the Life and Death of a Star movie, you know that stars eventually expand. Will the sun expand too? Yes, it will. The sun will become so big it will destroy Earth--but don't panic-- this will take about 6 billion years to happen.

The sun will continue to shine unchanged for several billion years.
In about 5 billion years, the sun will expand. As it grows, water on Earth's surface will start to boil. All people, plants, and animals will die from the heat.
When the sun turns into a red giant star, Earth will be burned to a crisp, and its atmosphere will be stripped away.
A few million years later, the thin outer layers of the Sun will have consumed Earth, after consuming Mercury and Venus, but Mars is far enough away that it will probably escape.
After the red giant stage, the sun will run out of fuel for the nuclear reaction in its core. It will shrink and become a white dwarf star. If you were to look at the sun from Mars after the sun's death, it will only look like a pinpoint of light. Earth, Mercury, and Venus will no longer exist.