I think some of them are using the filters to show different minerals. But I'd need to check. Here's an example on the NASA site: https://www.nasa.gov/image-f

I think some of them are using the filters to show different minerals. But I'd need to check. Here's an example on the NASA site: https://www.nasa.gov/image-feature/revealing-what-lies-beneath/ https://www.nasa.gov/image-feature/revealing-what-lies-benea...