File:Effect of light pollution on clouds.jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file (1,236 × 409 pixels, file size: 154 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description
English: The combined image shows how light pollution affects the appearance of clouds at night. The photo at left, taken by Ray Stinson in Glacier National Park, shows that in pristine areas clouds appear black, because they block out starlight. The photo at right, taken by Christopher Kyba in Berlin, was published as a part of a light pollution research paper, and shows how clouds are lit from below by light pollution, dramatically brightening the night sky.
Date
Source http://userpage.fu-berlin.de/~kyba/images/night_cloud_comparison.html
Author Christopher Kyba and Ray Stinson

Photo from Glacier National Park: There was no Moon as it was near New Phase. All of these photos were taken at a turn-out on the GTTSR 2.5 miles west of St Mary Visitor Center called Two Dog Flat right around mid-night to one am. My SQM reading this night was 21.71 with the meter pointed just above the Big Dipper handle which was the darkest part of the sky.

The silhouette in the photo from Berlin is the water tower on Schmidt-Ott-Straße 13. The bright tower at left is Funkturm Berlin

Licensing

[edit]
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current13:36, 11 August 2011Thumbnail for version as of 13:36, 11 August 20111,236 × 409 (154 KB)Ckyba (talk | contribs)

You cannot overwrite this file.

There are no pages that use this file.

File usage on other wikis

The following other wikis use this file:

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Effect_of_light_pollution_on_clouds.jpg&oldid=812872777"