Fun fact incoming: there is a mini-magnetosphere centered around Mare Crisium on the Moon. http://onlinelibrary.wiley.com/doi/10.1029/2009GL041721/abstract;jse

Fun fact incoming: there is a mini-magnetosphere centered around Mare Crisium on the Moon. http://onlinelibrary.wiley.com/doi/10.1029/2009GL041721/abstract;jsessionid=1DCF99B6136DB85166DC63391AE9C980.f03t04 http://onlinelibrary.wiley.com/doi/10.1029/2009GL041721/abst... It's only 360km across though...