It’s been touted as a race to the lunar south pole, but there's much more to India's and Russia’s moon shots than who lands first. India's Chandrayaan-3 lunar lander launched on July 14 and entered lunar orbit on Aug. 5. It is currently lowering its orbit in preparation for a landing attempt that's expected to occur on Aug. 23. Meanwhile, Russia is making its first visit to the moon since 1976, when its Soviet-era sample return mission dubbed Luna-24 took place. Luna-25 launched on Aug. 10 and, having taken a more direct route to the moon, could make a landing...