Sunspots, which are temporarily darkened areas on the surface of the sun, are the result of intense ... track of starspot activity on a red giant star called XX Trianguli, and the irregular ...

The magnetic field of the Sun is generated by a dynamo effect caused by its convective and rotational movements. It will evolve when our star becomes a red giant in the distant future. The giant ...

At this stage, the star becomes a large red giant ... a billion years–compared with the ten billion the same star may already have spent burning hydrogen like our own sun.