CHAPTER I Cosmology and Time
Cosmology is the science that studies the universe, the cosmos. Cosmos is a word used in earlier Greek metaphysical thought that means 'harmony' or 'order', as opposed to Chaos. In one Greek theory of creation, Chaos is the formless matter from which the cosmos, or harmonious order, was created (EP: 'Cosmology', II: 237-244; 'Chaos and Cosmos', II: 80-1). And Time is one of the most fundamental issues in philosophy and cosmology, since the whole of existence is nothing but consecutive series of events in time. Everybody feels time, but most people don't question it because it is commonly experienced every day in many things and is so familiar. However, it is far more difficult to understand the philosophical nature of time and its characteristics.
Throughout the history of philosophy, many opposing views have emerged to discuss and describe the different aspects of time, and some novel hypotheses have eventually emerged in modern cosmology. However, it is still the dream of every physicist to unveil the reality of time, especially since all modern theories have come to the conclusion that time is the key.