The Sun won’t explode in a dramatic fireball, but its ending will still be pretty wild. In about 5 billion years, it will run out of hydrogen, which is the fuel that keeps it shining. When that ...

When the Sun becomes a red giant, will the outer planets and moons become more temperate and conducive to Earth-like life? Terrence A. Murray Cincinnati, Ohio When the Sun runs out of hydrogen fuel ...

People always want to know what will happen to Earth when the sun eventually swells up as a red giant. For one thing, the expanding sun will turn the inner planets into cinders. It will almost ...