Moon color map: NASA Scientific Visualization Studio. CGI Moon Kit (2019 map), Ernie Wright; source LROC/ASU.
https://svs.gsfc.nasa.gov/4720
https://www.nasa.gov/nasa-brand-center/images-and-media/
Adapted as a 256x256 orthographic hemisphere for this application.
Used under NASA media usage guidelines, not a CC0 license. No NASA endorsement is implied.