A clear sky over Flagstaff
An absolutely stunning nightscape taken ten kilometers from Flagstaff (Arizona) just three weeks ago: the San Francisco Peaks covered with lenticular cloud with the Milky Way behind. All a testament to the status of the city as the first International Dark Sky City. Having spent plenty of time in Flagstaff, I can attest to the spectacular skies at night, but obviously I’ve never seen anything like this. APOD has a (much) bigger version which you really need to see.