Astronomy
The Mechanisms Driving the Sun's 11-Year Solar Cycle
Quick fact
During solar maximum, the Sun's magnetic field is so tangled that sunspots can be larger than Earth, and the number of spots skyrockets from near zero to hundreds.
Why this is interesting
The Sun we see today is calm, but every 11 years it becomes a storm of spots and flares. Why does this happen on such a regular schedule?