Noctilucent clouds are like the night owls ... wave-like formations. These dark clouds are associated with atmospheric instability and turbulence, often appearing before thunderstorms.

They’re called “noctilucent clouds” because they glow in the dark (hence “lucent,” which is derived from the Latin word for ...

Noctilucent, or "night-shining", clouds can be seen on Mars, just as they are on Earth. Nasa's Curiosity Mars rover imaged these high-altitude clouds on 17 May, 2019, using its navigation cameras.

The clouds are still in sunlight while the ground is darkening after the Sun sets. Meteorologists call these noctilucent clouds, which essentially translates to "night-shining" clouds.

you may be able to see ephemeral Noctilucent clouds, the Earth's highest cloud, glittering across the skies 50 miles above ground! Astronomical twilight is the transition to fully dark skies ...