I Dev Raval am 13 years old and studying in 8th std. I believe that age is just a number when determination is strong to show the ability and hence my interest in exploring about the Universe and Physics made me to write this book. It’s not just a book for me but is my understanding about the subject which is surely different from others. My aim is to never stop myself from learning more and more knowledge to give it back to my Nation in some or the other way.