text: the mass of of venus and mars combined is just shy of that of the earth.? if it were possible, do you think mankind should pursue a project to increase the orbit of venus to that of mars to create a new earth? moving and terraforming venus would be a substantial undertaking, i suspect. it would be easier to terraform mars, even in its current orbit.   there is a surprising amount of professional activity and speculation about what it would take to terraform mars. i have attached a tiny sample of what is available on the internet. terraforming mars would still be extremely challenging, and would take hundreds, if not thousands or millions of years.   it would be definitely far easier to make sure we are better stewards of our own planet. one of the first things we need to do is limit our population growth. we should think about sustainable agriculture, and better energy sources. it is not a particularly viable solution, at least yet, to despoil our planet and then go move to another one after we have ruined this one.