In an age when most Americans live under a permanent glow that hides the stars, Wyoming offers an increasingly rare gift: genuine darkness. As the least populous state, it is blanketed in vast stretches of country where artificial light barely intrudes, and the night sky returns in full glory.

The effect can be overwhelming for visitors from the cities. On a clear, moonless night far from town, the Milky Way arches overhead as a luminous band, thousands of stars crowd the sky, and features invisible in light-polluted skies emerge in vivid detail. It is the sky humans watched for most of history, now vanished from much of the modern world.

The national parks have embraced this asset. Yellowstone and Grand Teton host astronomy programs, and their remoteness makes them natural observatories. Beyond the parks, nearly any patch of Wyoming's high desert or mountain country offers spectacular viewing with nothing more than a blanket and patience for the eyes to adjust.

Preserving that darkness has become a quiet cause. Some communities have adopted lighting that reduces glare and protects the night. For travelers, the reward is simple and profound: a chance to lie back beneath a sky ablaze with stars, and to feel, however briefly, the true scale of the universe overhead.