BEIJING (AP) — China launched a ground-breaking mission Saturday to land a spacecraft on the largely unexplored far side of the moon, demonstrating its growing ambitions as a space power to rival Russia, the European Union and the U.S.

A Long March 3B rocket carrying a lunar probe blasted off at 2:23 a.m. from the Xichang Satellite Launch Center in Sichuan Province in southwestern China, the official Xinhua News Agency said.

With its Chang'e 4 mission, China hopes to be the first country to make a soft landing, which is a landing of a spacecraft during which no serious damage is incurred. The...