It took me some time to get into this book, but I found it really rewarding. The book almost feels too easy and a little bit boring at the beginning with his discussion of the moon and Mars. You wonder, for a moment, if the book will only cover the color of the sky and differences in gravity. However, Plait gradually steps up the game, offering more detail and illuminating aspects about the universe. His discussion of binary systems (especially "P-Type Systems") was especially challenging for me, and his writing about nebulae wasn't the easiest either, although I was able to make sense of it.

(As an aside, what really stands apart in this book are the footnotes--they're great!)