Teil eines Buches,

SUN–EARTH ASTRONOMICAL RELATIONSHIPS

.
Seite 1--28. Elsevier, (1983)
DOI: 10.1016/b978-0-12-373750-2.50006-9

Zusammenfassung

This chapter discusses the motion of the earth around sun and around its polar axis, the angle between the earth's equator and the plane containing the sun–earth orbital system. It presents the trigonometric equations relating the position of the sun to a horizontal or an inclined surface. The chapter focuses on the relevant astronomical relationships that do not require a prior knowledge of solar radiation. The earth revolves around the sun in an elliptical orbit with the sun at one of the foci. The amount of solar radiation reaching the earth is inversely proportional to the square of its distance from the sun. Solar time is based on the rotation of the earth about its polar axis and on its revolution around the sun. A solar day is the interval of time as the sun appears to complete one cycle about a stationary observer on earth. The solar day varies in length through the year. The chapter presents an overview of the calculation of the sun–earth distance, declination, and the equation of time.

Tags

Nutzer

  • @pbett

Kommentare und Rezensionen