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They're on the ISS. They could stay there indefinitely. Since other spacecraft resupply the ISS too, the limiting factor is simply medical: long duration zero-G is bad for the body. But they could easily stay there a year or even two.
Yes, other than the bones deteriorating. Space X will bring them down.
They're on the ISS. They could stay there indefinitely. Since other spacecraft resupply the ISS too, the limiting factor is simply medical: long duration zero-G is bad for the body. But they could easily stay there a year or even two.