Northern lights occur when a solar flare interacts with Earth's atmosphere.

Of all the things to worry about, the explosion of our sun is perhaps one of the least pressing. The Earth has seen five massive extinction events, and it's therefore natural to wonder whether we, as ...

A rapidly growing sunspot has fired off at least 18 M-class and three X-class flares in just 24 hours, including an intense X8.3 eruption.