Glance skyward on a clear, moonless night while in downtown Portland. What do you see? Perhaps you’ll see a handful of the brightest stars poking out from the glare of the city’s lights, but otherwise, you’ll likely see nothing but a void. Imagine being a migrating bird, soaring through the nighttime sky, using the stars to navigate. But you come upon a major city, and the twinkling starlight fades into a featureless sky-glow. You find yourself disoriented.