Read space crowdsourcing service CosmoQuest’s third post explaining the science behind Moon Mappers. Their recently-published peer reviewed paper showed how effective crowdsourcing is in the analysis of craters on the Moon. In part 1 of the series, Nicolle Gugliucci explained why mapping craters is an important first step in studying the geology of planets and moons. In part 2 she looked at how the paper’s authors compared Moon Mappers’ amateur crater counters to professional planetary scientists. The latest post looks at the analysis itself and how amateurs produce work just as good as - and in some ways better than - the experts. You can read the original paper if you have access to the journal Icarus (DOI: 10.1016/j.icarus.2014.02.022) or you can read the free preprint (arXiv: 1404.1334).