What is the primary purpose of In-Situ Resource Utilization (ISRU) for a Mars mission?
Answer
To extract water, generate oxygen, and produce fuel
ISRU enables a mission to remain self-sufficient by leveraging local Martian resources, which is a necessity because resupply from Earth is impossible during the transit and stay. By extracting water from the soil, generating oxygen from the atmosphere, and producing methane or other fuels for the return trip, the mission reduces the dependence on Earth-based logistics and minimizes the massive initial launch mass required for the voyage.
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