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:
Lowell crater p. Lowell crater on Mars This is figure on of NASA SP VIKING ORBITER VIEWS OF MARS which has the following caption Lowell Crater As on the Moon and Mercury very large impacts form multiringed basins such as this km diameter crater Radial lines of secondary craters are clearly visible outside the more disordered terrain