Movie: Analemma Over New Jersey . ... Credit Copyright: Tom Matheson ( Guidescope.net ) Explanation: An analemma is that figure-8 curve that you get when you mark the position of the Sun at the same time each day throughout planet Earth's year. ... The tilt of planet Earth's axis and the variation in speed as it moves around its orbit combine to produce the graceful analemma curve . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...