The Moon’s near side, the one we all see, has been the target of numerous robotic and human missions. However, our lunar companion’s far side, which is not visible from Earth, has never been explored. That changed on Jan. 2, 2019, when Chinese spacecraft Chang'e 4 made a soft landing on what is often referred to as the “dark side,” because it remained largely unseen until humans were able to send spacecraft around the Moon in 1959.