The document discusses several topics related to Earth-Sun relationships and topographic maps, including: 1) It describes the Earth's orbit around the Sun, the timing of seasons, and how Earth's rotation and revolution influence day and night. 2) It discusses the use of an analemma to determine the subsolar point and calculate solar altitude and zenith for any location and date. 3) It provides an overview of topographic maps, including how contour lines represent elevation and how maps can be used to measure distances.

1. Earth and Sun Relationships and Topographic Maps Lab Two

5. The first days of the seasons are solstices and equinoxes. These are key periods within Earth-Sun Relationships.

8. Analemma WHAT IS AN ANALEMMA? An analemma is a natural pattern traced out annually in the sky by the Sun.

18. Done at 8:30 AM Eastern Time

19. http://vrum.chat.ru/Photo/Astro/analema.htm It shows position of the Sun on the sky in the same time of a day during one year. Analemma - a trace of the annual movement of the Sun on the sky - is well known among experts of sun-dials and old Earth's globes as a diagram of change of seasons and an equation of time. Between August 30th 1998 and August 19th 1999 I have photographed the Sun 36 times on a single frame of 60-mm film. The pictures were taken exactly at 5:45 UT (Universal time) of every tenth day.

24. Compass

25. Compass Directions