The Sun Rotating . ... Credit Copyright: SDO , NASA ; Digital Composition: Kevin Gill ( Apoapsys ) Explanation: Does the Sun change as it rotates? ... In the above time-lapse sequences, our Sun -- as imaged by NASA 's Solar Dynamics Observatory -- is shown rotating though the entire month of January. ... The Sun takes just under a month to rotate completely -- rotating fastest at the equator. A large and active sunspot region rotates into view soon after the video starts. ...