The moon is bracing to deal with a crowd in a few days’ time. Chandrayaan-3 is already knocking on its doors, scheduled to descend on its surface on August 23 or 24. Russia’s Luna 25 spacecraft is preparing to begin its journey later this week, and will make a touchdown around the same time as Chandrayaan-3. Japan’s SLIM (Smart Lander for Investigating Moon) is slated to join the party soon after, with its launch scheduled for August 26. SLIM’s landing time has not been revealed yet, but if it takes a shorter route to the moon and arrives within two...