English: Rosetta navigation camera image taken on 11 August 2014 at about 102 km from comet 67P/Churyumov-Gerasimenko. The comet nucleus is about 4 km across.
This photography is a RosettaNAVCAM image created by the European Space Agency (ESA). Their website states : "All Rosetta NAVCAM images are released under the Creative Commons Attribution-ShareAlike 3.0 IGO License. The user is allowed to reproduce, distribute, adapt, translate and publicly perform this publication, without explicit permission, provided that the content is accompanied by an acknowledgement that the source is credited as "ESA/Rosetta/NAVCAM, CC BY-SA IGO 3.0" as the source. A direct link to the license text is provided and that it is clearly indicated if changes were made to the original content. If any changes are made to the images, remix, translate or adaptation must be published under the same license terms (CC BY-SA 3.0 IGO) or a compatible license. You must also not give any suggestion that ESA necessarily endorses the modifications that you have made." To the uploader: You must provide a link (URL) to the original file and the authorship information if available.
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.