Below one can find 1) a general introduction to polarimetry physics and concepts 2) information on polarimeters including a list of known polarimeters around the world compiled collaboratively by many polarimetrists and 3) a brief (far from exhaustive) introduction to some of the historic contributions of polarimetry to planetary science.
If there’s a concept or topic you would like to see added here, please email me. I’m involved in a lot of outreach and would be keen to create a more useful virtual explainer. One might also consider checking out some of the outreach resources available on my website as well.