Astronomy
The Magnetohydrodynamics of the Sun's Differential Rotation
Quick fact
The Sun's equator completes a rotation in about 25 days, while the poles take about 35 days. This differential rotation stretches the Sun's magnetic field lines, winding them up over time and producing sunspots and the 11-year solar cycle.
Why this is interesting
You've probably noticed that the Sun rotates, but did you know that its equator spins nearly 20% faster than its poles? Why doesn't the Sun rotate like a solid ball, and what does that uneven spinning have to do with its dramatic magnetic storms?