Bill The Cat

By billthecat

Noctilucent clouds over Champfleurie

Worth checking each night in summer when it's clear to see if there are any noctilucent clouds making an appearance.
They are tenuous cloud-like phenomena in the upper atmosphere of Earth. They consist of ice crystals and from the ground are only visible during astronomical twilight in latitudes 50 - 70 and are at around 80 km high.
Keep your eyes peeled night owls!

Comments
Sign in or get an account to comment.