When China’s newest astronauts, Jing Haipeng and Chen Dong, arrived in orbit earlier this year, they docked at some impressive digs. Specifically: the orbital laboratory Tiangong-2 (Heavenly Palace 2), which is more than 34 ft. long and nearly 14 ft. wide and includes an exercise area and a medical-­experiment bay. Yes, that’s all modest compared with the multimodule International Space Station (ISS), which is roughly the size of a football field, but it’s a remarkable machine all the same. China, after all, built Tiangong-2 on its own, just over a decade after launching its first man into space; the ISS is a collaboration among 15 nations, including space veterans like the U.S. and Russia. China’s next move: launching the core module for a much bigger space station, set to happen sometime in 2018.