The Sun's activity typically peaks at solar maximum, but there's an even more dangerous stage it could enter, and with ...

What are solar cycles? What is the solar maximum? The number of sunspots on the sun's surface changes on a fairly regular cycle, which scientists refer to as the sun's 11-year solar cycle.

There may be more northern lights – or aurora borealis – sightings this spring. As we near the spring equinox, also known as the vernal equinox, on March 20, the Earth's magnetic field and ...