*Revised and updated for the twenty-first century* In this updated, illustrated companion volume to Merlin's Tour of the Universe, we visit again with Merlin, a timeless space traveler from Planet Omniscia, who answers a collection of imaginative questions about the cosmos from Earthlings of all ages. Whether waxing poetic about Earth and its environs, the Sun and its stellar siblings, the world of light, physical laws or galaxies near and far, Merlin's remarks are engaging, humorous, and clear as a starry night sky. Merlin hasn't been stumped yet, responding to questions including: If aliens exploded our moon, what effect would it have on us? What are your thoughts on the theory that a star named Nemesis is circling our solar system and was responsible for killing off the dinosaurs? If I leave a container on my roof for a period of time, can I collect particles from outer space? Just Visiting This Planet is a timeless book for all travellers of the universe.