China launches Mengtian, final module to complete Tiangong space station

China has launched the last experimental module to finish construction of its Tiangong space station, which will orbit the Earth as a space outpost and research laboratory. Carried by a Long March 5B heavy-lift rocket, the 23-tonne Mengtian lifted off from Wenchang Satellite Launch Centre on southern China’s Hainan island. It’s expected to dock with Tiangong’s core module within hours of lift-off.