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Welcome to Stack Exchange Space Exploration! Trying to make use of excess launch capacity with low-risk payloads is definitely a good idea. Finding customers who need that capacity, and getting the payload to where they need it, however, is a problem. Getting the payload to where they need it When something is launched into orbit and the thrusters stop ...


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Quite possibly Upon learning that Mars did have surface water at some point, you have updated your question to ask if Mars would be a good approximation for Earth if Earth had little to no water, or if the water had been missing for a period of time. Conversely, try looking at areas of the Earth that have had little to no water, or where the water has been ...


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