This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionEarth in True Color - Rosetta.jpg
English: After its closest approach to Earth, Rosetta looked back and took a number of images using the OSIRIS Narrow Angle Camera (NAC). This particular image was acquired 15 November 2007 at 03:30 CET.
The image is a colour composite of the NAC Orange, Green and Blue filters.
At the bottom, the continent of Australia can be seen clearly.
Attribution: ESA & MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA
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.