Each destination forces a different engineering conversation. LEO is a rescue ride away; a Lagrange point is a week from help; Mars is a 900-day commitment; Jupiter is a 5-year gamble with existential radiation. This guide walks through what changes — physiologically, operationally, on the reliability sheet, in the radiation dose, in the comms delay, in the rationing mass — as humans push further from Earth. Tap any destination to explore, or use the interactive tools at the bottom.
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