Headlines > News > Noctilucent Clouds over London

Noctilucent Clouds over London

Published by Klaus Schmidt on Thu Jul 10, 2014 5:12 pm via: NASA
Share
More share options
Tools
Tags

This scene from the early morning hours of July 3 looks out across the River Thames from the Westminster Bridge. Part of a luminous timelapse video, the frame captures a sight familiar in London, the nighttime glow of the London Eye. But a not-so-familiar sight is shining in the still dark sky above, widespread noctilucent clouds.

From the edge of space, about 80 kilometers above Earth’s surface, the icy clouds can still reflect sunlight even though the Sun itself is below the horizon as seen from the ground. Usually spotted at high latitudes in summer months the diaphanous apparitions are also known as polar mesospheric clouds.

Image Credit & Copyright: Christoph Malin (TWAN)

Image Credit & Copyright: Christoph Malin (TWAN)

The seasonal clouds are understood to form as water vapor driven into the cold upper atmosphere condenses on the fine dust particles supplied by disintegrating meteors or volcanic ash. NASA’s AIM mission provides daily projections of the noctilucent clouds as seen from space.

No comments
Start the ball rolling by posting a comment on this article!
Leave a reply
You must be logged in to post a comment.
© 2014 The International Space Fellowship, developed by Gabitasoft Interactive. All Rights Reserved.  Privacy Policy | Terms of Use