Noctilucent Clouds

When I took the dogs out last night at 11pm, I noticed that there were noctilucent clouds showing up above the Northern horizon. I dashed back and grabbed the camera for a couple of shots before they faded from view:

These are time exposures of ten seconds, so the sky appears brighter than in fact it was (you can also see some stars). This is the first time that I’ve ever been aware that I was looking at this particular meteorological phenomenon.