While the Earth rotates once a day about its axis between the north and south poles, it revolves about the Sun in its orbit but once a year. ... This tilt causes the Sun to appear higher in the sky during the summer than during the winter. ... Activity 2-1: The Sun's Changing Path . ... Activity 2-4: The Analemma . ... looking at the Sun can cause permanent eye damage- . ... The other should be flat on the ground, or even tilted slightly backwards from the Sun if the Sun is especially high in the sky. ...