There's words next to the pretty pictures... (^_^)
 Quote:
Noctilucent clouds, also known as polar mesospheric clouds, are bright cloudlike atmospheric phenomena visible in a deep twilight...
...are visible only when illuminated by sunlight from below the horizon...


Glow-in-the-dark usually refers to things that are luminescent and they glow in the day time not just at night.

Last edited by Myridon; 04/17/2008 10:23 PM.