As the undisputed champion, the Moon has received more visitor spacecraft than the other nine bodies on this list combined. Since the USSR's Luna 2 made its historic impact in 1959, humanity has launched over 150 missions to our nearest neighbor. This level of activity stems not only from its proximity but also from its role as the ultimate 'proving ground' for deep-space exploration—ranging from the Apollo manned missions to the modern-day International Lunar Research Station (ILRS) and the Artemis program. In stark contrast, Mars, while highly popular, has seen only about one-third the number of arrivals due to the significantly higher barriers imposed by distance and orbital mechanics.