From the Book - First edition.
One small step : the Moon
Vermin of the sky : asteroids and comets
One ringed world to rule them all : Saturn
At the solar system's edge : Pluto
A mini-solar system : planets around red dwarf stars
Tatooine's sky : planets with two suns
A planet with a million suns : globular clusters
Inside star factories : nebulae
The last sky you'll ever see : black holes