It sort of depends on your definition of terra forming. Like if your goal in Earth 2.0 … Then your likely not going to get there… there not enough free mass in the solar system to build mars up to size of earth. But if your goal is to make mars livable. we could build into mars crust to allow for high pressure areas … If the goal is to get a temporary atmosphere … that would take a few millennia active effort
What if all the effort needed to terraform Mars would be invested in fixing the disaster we started on Earth... I bet the effort would be better invested here. Not even talking about how much of resources will be needed to bootstrap the Mars project. Terraforming Mars will sacrifice Earth.
No, not really. Mars has a very weak magnetosphere, so you need shielding against radiation. Also there is no atmosphere and any atmosphere we put on mars will quickly (in a geological timescale) get blown away by the charged solar winds because there is no magnetic field. So it's an immense task, and probably a few hundred years out before we have the technology.
That's what I thought. We would have to figure out a way first to either start Mars's core spinning again or to artificially create a magnetosphere to be able to keep an atmosphere in place. Neither of which we have the capability to do.
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