Clouds play a starring role in the background of our lives, so much so that it’s noteworthy when we get to gawk at the spectre of a crystal clear sky. Every cloud is worthy of a gaze to admire ...

Noctilucent clouds (NLCs), or polar mesospheric clouds, are breathtaking to see. And these are no ordinary clouds. They form in the highest part of our atmosphere, at an altitude of 80 kilometres.

This image shows the beauty of noctilucent clouds over Medicine Hat, Alta., in 2021. This is the best time of year to catch these electric-blue clouds, which appear after sunset and before sunrise.

Northern lights and noctilucent clouds shining in Alberta skies, June 9. (Image credit: @TheAuroraGuy) Thomas captured the scene using a Nikon D810 camera with a 50mm lens, shooting 1/30-second ...