This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Mercury In ColorProckter centered by Merlin.svg The Planet Mercury Bitmap Trace The Gimp was used to scale reduce colours to clean up image Inkscape simplify path was not used Original Public Domain Image can be found at org org org Merlin Custom marker PDOpenClipart Uploaded with Mercury planet SVG astronomy