A private Japanese moon lander went into free-fall while trying to land on the lunar surface last month, company officials have said, blaming a software issue and a last-minute switch in the touchdown location. The spacecraft belonging to the company ispace was originally supposed to land in a flat plain but the target was changed to a crater before December’s launch. The crater’s steep cliff apparently confused the onboard software, and the two metre spacecraft went into a free-fall from less than three miles up, slamming into the lunar surface. The estimated speed at impact was more than 300 feet...