Can you show how this is calculated? What is the exact angle that the earth moves through in one solar day, assuming a circular motion? (how is this related to the average
angle per solar day for an elliptical motion?).
You might be. How is the angle that the earth travels through in a solar day related to the earth's distance from the sun? How much does this distance vary through out the year? How much does the angle vary? How much time does this variation represent?