Talk:Sky brightness

File:Lapalma-spectrum.png Nominated for speedy Deletion

An image used in this article, File:Lapalma-spectrum.png, has been nominated for speedy deletion for the following reason: All Wikipedia files with unknown copyright status

What should I do?

Don't panic; you should have time to contest the deletion (although please review deletion guidelines before doing so). The best way to contest this form of deletion is by posting on the image talk page.

If the image is non-free then you may need to provide a fair use rationale
If the image isn't freely licensed and there is no fair use rationale, then it cannot be uploaded or used.
If the image has already been deleted you may want to try Deletion Review

This notification is provided by a Bot --CommonsNotificationBot (talk) 03:21, 16 September 2011 (UTC)[reply]

The "Night Sky Brightness Table" seems to be copied without attribution

The table appears at

 http://www.ing.iac.es/Astronomy/observing/conditions/skybr/skybr.html

and includes explanatory verbiage that explains things better than the words in the Wikipedia entry — Preceding unsigned comment added by 2001:558:6045:FE:19CC:5CAE:C9B6:7B6E (talk) 23:47, 9 August 2014 (UTC)[reply]

Copyright concerns

Johnny C. Morse has raised concerns (here) that content in our article may have been copied from an outside source. Many thanks to that editor for keeping an eye out for copyright problems. In this case, though, I am confident that the copying is the other way round. Our article has been very stable since it was created on 1 May 2006, with no large additions of new content; the Study Guide for Galaxies in the Universe was published in 2014. That masterpiece appears to consist wholly of content copied, without acknowledgement or attribution (and thus in violation of our licence), from Wikipedia. I don't think there's any question that they copied their content on sky brightness from our page. I've put a {{Backwardscopy}} tag higher up this page. As for the question raised by 2001:558:6045:FE:19CC:5CAE:C9B6:7B6E about the table, I can't see any substantial overlap of phrasing with the outside source; if there is any that I've missed, please point it out here. Justlettersandnumbers (talk) 15:13, 3 September 2015 (UTC)[reply]