A Chinese unmanned lunar probe is on its way back to Earth after collecting rock samples from the far side of the moon, the country’s national space agency said on Tuesday as China vies to become the first nation to bring back samples from the remote area. A landing module of the Chang’e 6 spacecraft, named after the Chinese Moon goddess, landed on the moon’s far side on Sunday and lifted off again from the lunar surface on Tuesday afternoon, national space agency CNSA said. The module has reached the planned lunar orbit with the samples onboard, it added. According to the agency, the probe us…