The most striking feature of the Sun's magnetic field is its cyclic behaviour. The number of sunspots, which are dark regions of strong magnetic field on the Sun's surface, varies with a period of ...

IT is not often that it will fall to the lot of the physicist to harmonise such important theories as those of evolution and the nebular hypothesis, and much credit is due to the boldness and the ...

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.