Noctilucent Clouds and Aurora. This twilight double feature co-stars aurora borealis and noctilucent clouds, also known as northern lights and night-shining clouds, respectively. Auroras occur when solar particles react with gases in Earth's atmosphere, producing vivid light displays at the edge of space. Noctilucent clouds are the planet's highest-altitude cloud type, forming up to 50 miles high as ice crystals cling to meteor smoke. Their elevation lets them reflect sunlight well past sunset, creating a ghostly blue glow when most clouds are shrouded in darkness.
Here's the video, filmed by photographer Maciej Winiarczyk in northern Scotland: Unusual night-sky phenomena caught on film | MNN - Mother Nature Network