Content Reuse and Reprint Rights

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Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0).

You are free to share/reprint it as long as you include credit to the original Observatory author and link back to the Observatory’s original piece. Excerpts, adaptations, translations, and minor, reasonable edits for style that retain the original spirit of the text are permissible—provided you follow the CC 4.0’s license terms on attribution and include credit to the author and the link back to the original Observatory URL, with the same license as the original.

Here is an example of a correct credit line in the case of unaltered reuse:

For all other licensing inquiries, such as for non-editorial use/commercial licensing (such as for a printed book or website accessible only through paid subscriptions), please contact us with your specific license request.

The Observatory is not responsible for any errors in reprinted material.

Reprinted material from the Observatory must retain the original source links and integrity of quotation marks to give credit as in the original (if text links are not possible in your publication, please insert footnotes/endnotes/internal citations).

If you are found to be in violation of these terms, you must immediately comply or else unpublish the reprinted material.

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