Thankfully, our sun's sunspot activity occurs along an ... astronomers have been keeping track of starspot activity on a red giant star called XX Trianguli, and the irregular behaviour of its ...

Our star will grow larger than we can imagine — so large that it will envelop the inner planets, including Earth. That's when the sun will become a red giant, which will remain for about a ...

Publications of the Astronomical Society of the Pacific, Vol. 114, No. 794 (April 2002), pp. 375-402 (28 pages) ABSTRACT Theoretical predictions of red giant branch stars’ effective temperatures, ...

Whenever you gaze upon the stars and constellations it’s easy to forget you’re seeing a three-dimensional picture. The ...

The Sun is at this stable phase in its life. When all the hydrogen has been used up in the fusion process, larger nuclei begin to form and the star may expand to become a red giant. The most ...

Stars like our sun fuse hydrogen in their cores into helium ... At this stage, the star becomes a large red giant. Because a red giant is so large, its heat spreads out and the surface ...