Astronomers modeled sunspot activity on a nearby red giant star to learn about its chaotic interior. Sunspots, which are temporarily darkened areas on the surface of the sun, are the result of ...

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 ...

can be linked to the dynamo mechanism operating inside the sun," co-author Zsolt Kővári explained in a statement. "The large-amplitude variations in the brightness of the red giant XX Tri have ...