A Brief History Of Time: Journal Entry 9

Chapter 9 (Pg 147-157) The main focus of this chapter of the book is about the Three Arrows of Time: the thermodynamic arrow of time, the psychological arrow of time, and the cosmological arrow of time. The thermodynamic arrow of time is the direction in which the state of chaos in the universe increases. The psychological arrow of time is the direction in which we feel time pass. And the cosmological arrow of time is the direction in which the universe is getting bigger not smaller. The first arrow of the time, thermodynamic arrow, is based off the second law of thermodynamics in which there are disordered states then ordered ones. Like for example in a jigsaw puzzle there is only one correct arrangement while there are infinite amounts of incorrect arrangements. It explains that if all arrows are pointing in the same it would make sense that there would be someone to say why disorder increase as time goes by in which the universe is expanding?