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 ...

A red giant star is a dying star in the last stages of stellar evolution. Our own sun will turn into a red giant, expand and engulf the inner planets.

How big it is: 865,000 miles (1.392 million kilometers) across How far away it is: 93 million miles (150 million km) What ...

New research suggests there may be a narrow window of possibility for life to persist on the icy moons of the outer solar system.

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 ...

Giant 'senior citizen' sunspot on 3rd trip around the sun could break a century-old record A mysterious, 100-year solar cycle may have just restarted NASA's Parker Solar Probe spots powerful ...

As a sun-like star nears the end of its life, it expands into a red giant, about 100 to 1,000 times its original size, eventually overtaking the space around it, including nearby planets.

The Sun will most likely eject its outer layer more slowly than those stars and will stay in its red-giant phase several times longer. But a great deal is still unknown about the Sun’s last act.

The night sky might be about to gain a brand-new star thanks to a distant sun exploding violently. This far-distant stellar system is situated around 3,000 light years away from Earth and is ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. An artist's visualization of some of the spots on red giant XX Trianguli. | Credit: Viktor ...