(any faster and it will fly off into interstellar space). Coming in from Martian orbital velocity will still be fairly energetic, but far less than the potentially 72Km/s possible for a body in Solar orbit.
People on Mars are not going to appreciate being told to hunker down in underground earthquake proof shelters for decades or centuries only to discover they are back to square 1.įor this to work properly, the comet engineers will have to do a lot more work calculating the delta-V needed to get the comet to Mars, and then doing some elaborate orbital manoeuvres to bleed off all the energy and do a relatively "soft" landing. The biggest issue with simply diverting comets to Mars is the impact energy is as likely to blow away as much water and atmosphere as is delivered.
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