The star, R Doradus, is a red giant roughly 350 times the Sun’s diameter. Its convection cells are dozens of times the size of the Sun itself, and they rise and fall over a period of a few weeks.

Researchers have discovered magnetic fields deep within the merging galaxy Arp 220, suggesting these fields might be crucial ...

By Andrew Unterberger For the last three years at Billboard, our editorial staff has counted down its picks for the 10 Greatest Pop Stars of the year, with full essays for everyone from No. 10 ...