Lauren Sánchez and Katy Perry were onto something with their much-hyped (and equally ridiculed) jaunt into space. But neither pop stardom nor a billionaire fiancé is necessary to tap into travel’s latest frontier: the skies. From the mountains of Colorado to the deserts of Arabia, astrotourism is capturing the imagination—and wallets—of intrepid nomads.

One step below rocketing into the heavens, astrotourism is all about stargazing. The goal is to recharge in luxurious hotels far from civilization while learning to appreciate the power of darkness.