Overlap Zoo (NASA): classifying pairs of overlapping galaxies online

For anyone, no prior knowledge needed: a NASA citizen science project launched in 2026 in which volunteers view images of galaxies that Galaxy Zoo volunteers previously identified as overlapping, verify that a galaxy pair is present, classify key features of each galaxy and mark their outlines. The work helps build the first large-scale catalogue of galaxy pairs suitable for dust studies. The in-project tutorial takes 10-15 minutes, after which volunteers can work as long as they like; an internet-connected computer is enough, and findings can be discussed in the Talk forum.