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Mining operations require special equipment to handle the extraction and processing of ore in outer space.but once in place, the ore can be moved about more readily due to the lack of gravity.In situ mining will involve drilling boreholes and injecting hot fluid/gas and allow the useful material to react or melt with the solvent and the extract the solute.
Minerals can be mined from an asteroid or spent comet then used in space for construction materials or taken back to Earth.
Although asteroids and Earth accreted from the same starting materials, Earth's relatively stronger gravity pulled all heavy siderophilic (iron-loving) elements into its core during its molten youth more than four billion years ago.
This left the crust depleted of such valuable elements until a rain of asteroid impacts re-infused the depleted crust with metals like gold, cobalt, iron, manganese, molybdenum, nickel, osmium, palladium, platinum, rhenium, rhodium, ruthenium and tungsten (some flow from core to surface does occur, e.g.
Humans would also be useful for troubleshooting problems and for maintaining the equipment.
On the other hand, multi-minute communications delays have not prevented the success of robotic exploration of Mars, and automated systems would be much less expensive to build and deploy.