> Does building a magnetosphere for the purposes of protection require an atmosphere ... No, it's the other way around -- for a sustainable atmosphere, one nee

> Does building a magnetosphere for the purposes of protection require an atmosphere ... No, it's the other way around -- for a sustainable atmosphere, one needs a magnetic field. > If it doesn't require an atmosphere, could this approach be used to build a magnetospher around the moon? That would have an effect on surface radiation from charged particles, but the moon can't have an earth-like atmosphere because of its low gravity. So the payoff is smaller. More details: http://arachnoid.com/restoring_mars http://arachnoid.com/restoring_mars