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:
Mars Viking a. Viking lander image of martian sunset over Chryse Planitia In this image the sun is degrees below the local horizon The banding in the sky is an artifact produced by the incremental brightness levels of the camera This image was taken on the th martian day sol after touchdown at local time on August UTC The