On the cover of the book referenced in Question 4, Stephenson's name obscures a curve which is an example of the "lemniscate of Bernoulli." This shape is generated by deviations in the position of the sun in the sky throughout the year from a fixed point on the earth's surface and at a fixed time of day. *What name* is given to this curve when it is generated by the position of the sun?
Analemma