With no recorded sightings before 1885, noctilucent clouds have been linked to volcanoes, pollution or climate changeAs summer arrives in the northern hemisphere, so do the noctilucent clouds – hopefully. These high-altitude formations are as enigmatic as they are beautiful. Their name derives from Latin, meaning “night shining”.They appear during the summer months and glow with an electric-blue intensity against the darkening western sky. Look for them about half an hour after sunset. Continue reading...

Source: https://www.theguardian.com/news/2026/jun/01/enigmatic-summer-phenomenon-noctilucent-clouds