ISS retirement could place Tiangong as Earth’s only permanently crewed orbital outpost

The Wolf Amendment of 2011 blocked NASA-Chinese cooperation, steering China to build its own space station, Tiangong, while the ISS remains the international hub. With the ISS planned to retire around 2030 and no proven commercial crewed replacement ready, Tiangong could become the only permanently crewed outpost in low Earth orbit—though that outcome depends on whether commercial stations can reach readiness in time and on how NASA shifts to private operators. Tiangong’s ongoing crew rotations and infrastructure contrast with the ISS’s multi-country governance, creating a real strategic reshuffle in who occupies and controls the near-Earth space lab landscape.