Video: Progress launches and docks

Five satellites rode a Long March 2D rocket into orbit Monday from the Jiuquan launch base in northwestern China, including a pathfinder for a planned constellation of low-altitude relay satellites and a mysterious spacecraft ambiguously described by Chinese state media.

The launch of a Japanese H-2B rocket was called off Tuesday after a fire broke out on the launch pad a few hours before liftoff. A new target launch date has not been confirmed. The mission will carry an HTV cargo ship into orbit on a resupply run to the International Space Station.

China’s space program is sprinting toward the end of the year by extending the country’s record-breaking launch rate, with two more space missions lifting off in the last week carrying a pathfinder for a planned constellation of Internet satellites and a mysterious payload heading for geostationary orbit. At least one more Long March rocket is set to lift off Saturday to close out 2018.