The sun is the biggest object in the solar system; at about 865,000 miles (1.4 million kilometers) across, it's more than 100 times wider than Earth. Despite being enormous, our star is often called a ...

The Sun, our closest star, has always been an intriguing entity for scientists to delve into. Its fiery blaze and elemental nature have been subjects of study for centuries. However, a recent ...

Our Sun’s outer atmosphere, the corona, is millions of degrees hotter than it should be, and no one knows why.

Add Yahoo as a preferred source to see more of our stories on Google. A view of the Pleiades, a star cluster about 440 light-years from Earth. (ROBERT GENDLER/SCIENCE PHOTO LIBRARY/Getty Images) The ...

People in the U.S. were treated to stunning auroras last week when a powerful geomagnetic storm pushed the celestial displays as far south as Florida and Mexico. The spectacle was particularly ...