Picture if there was a pole that went through The middle of the earth verticaly. The tilt it slightly to its side. That is how the earth would rotate, on the pole.
I am sorry if this does not make any sense. I hope I explained it well enough.
The Sun rotates on its axis once in about 27 days. This rotation was first detected by observing the motion of sunspots. The Sun's rotation axis is tilted by about 7.25 degrees from the axis of the Earth's orbit so we see more of the Sun's north pole in September of each year and more of its south pole in March.
