ABSTRACT
Earth is one of the smaller of the nine planets forming the solar system. Each planet is distinct in terms of its physical geography. The different distances of the planets from the sun, their different sizes and composition ensure that each world is unique. They all depend for virtually all their energy upon the nearest star, which we call the sun. A basic understanding of what energy is, how it moves and how it can be transformed is required. In this chapter we examine the nature of energy and how it is emitted by the sun. Variations in sun – Earth relations create changes in the pattern and distribution of energy at the top of our atmosphere. Finally we study the mechanisms that carry this energy to all parts of Earth’s global system. No further reference will be made to the other planets but similar physical laws operate there.
