Chinese astronauts Deng Qingming, Fei Junlong, and Zhang Lu (left to right) undergo training before launch on the Shenzhou 15 mission. Credit: China Manned Space Agency
Three Chinese astronauts will strap into a Shenzhou spacecraft and rocket into orbit Tuesday in pursuit of China’s Tiangong space station on a six-month mission to transition the space lab from construction into an operational phase.

