There were two big light shows, in May and October. While the October event was a result of a straightforward solar storm, scientists are puzzled about the storm that caused the May aurora.

Colorful Northern Lights could be seen unusually far south ... field lines channel the steady stream of particles, called the "solar wind," to the poles. But when eruptions or other disruptive ...

For decades, scientists have tried in vain to accurately predict solar flares—intense bursts of light on the sun that can send a flurry of charged particles into the solar system. Now ...