im genuinely confused why we haven't terraformed europa ? constantly people talk about terraforming mars by melting the poles ect but like europas internal ocean is SATURATED with oxygen, which means even by conservative estimates there is 10mg per litre of oxygen, or 1 gram per square metre of ocean one cubic litre deep ( 10 cm), Europa ocean is over 100km deep, meaning there is over 1000 kgs of oxygen in a water column, the earths average pressure is 1000kg per square meter and even considering the lower gravity of 0.134 g's, if we melted europas ice crust with a 5 billion tonnes of a greenhosue warming gas with similar warming ability to sulfur hexafluoride ( not even that much, we currently produce 40 billion tonnes of co2 PER YEAR) then much of this oxygen would be released into the atmosphere of Europa, the end result would be a atmosphere which has an average temperature of 15 Celsius, a pressure above the Armstrong point, and the air at the cusp of breathability. Mars who? like wtf, we could beam power from io to europa using microwave rectenna and geothermal power, and from studies ive read it would only take a few hundred KW of VLF radiowaves to "clean out" the van allen belt of jupiter and lower radiation levels to human safe limits