Catch the cosmos on this 340-mile road trip, which weaves northward through the Grand Canyon State’s space-watching hotspots. Consider adding a few detours, like Petrified Forest National Park.

The detour will direct motorists around the road closure by way of Route 74, Mountain Road (SR 4040), Route 15, Century Lane, and Cabin Hollow Road (SR 4036). MORE: 'It's not done yet': Family ...