解説All-round activity - ESA Rosetta NAVCAM 20150225 26 27 27.jpg
English: Montage of four single-frame images of Comet 67P/C-G taken by Rosetta’s Navigation Camera (NAVCAM) at the end of February 2015. The images were taken on 25 February (top left), 26 February (top right) and on two occasions on 27 February (bottom left and right). The images have been processed to bring out the details of the comet’s activity. The exposure time for each image is 2 seconds.
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.