Here's why:

* Sunspots: Sunspots are cooler, darker areas on the Sun's surface that appear to rotate. This rotation is evidence of the Sun's overall spin.

* Differential Rotation: The Sun doesn't spin like a solid ball. Its equator rotates faster than its poles, which is called differential rotation.

* Solar Flares and Coronal Mass Ejections (CMEs): These powerful events, which release massive amounts of energy and particles, are influenced by the Sun's rotation.

So, both the Sun and planets spin. They spin due to the conservation of angular momentum from the initial cloud of gas and dust that formed our solar system.