For all the beauty and adventure of a luxury stay in a remote location, one of the greatest payoffs can come after dinner. Unleashed from the net of man-made lights that brighten our cities and suburbs, the universe unfolds above you: a zillion stars, constellations, coursing meteors and psychedelic auroras. Then you truly know why you came to this far-flung place: to witness the magic. Aching for a light show? Here are 12 hotels around the world where the nighttime viewing is at its best.