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 ...

For XX Trianguli, which is 630 light-years from Earth, the photocenter of the stellar disk can shift up to 10% of the star's radius relative to its geometric center, causing a displacement of 24 ...

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 images show the surface of the star R. Doradus, a red giant star 180 light-years away in the Dorado constellation. The star has a diameter about 350 times that of the sun, and it serves as a ...

The images show the surface of the star R. Doradus, a red giant star 180 light-years away in the Dorado constellation. The star has a diameter about 350 times that of the sun, and it serves as a ...

Astronomers modeled sunspot activity on a nearby red giant star to learn about its chaotic interior. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

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 Varga ...

For XX Trianguli, which is 630 light-years from Earth, the photocenter of the stellar disk can shift up to 10% of the star's radius relative to its geometric center, causing a displacement of 24 ...

These spots are even larger than the entire surface of our sun — which is why XX Tri has been dubbed "the most spotted star in the sky," Kővári said. Related Stories: ...