“ One technological hurdle in targeting the side of the moon that constantly faces away from Earth is that direct communication with the spacecraft is not possi

“ One technological hurdle in targeting the side of the moon that constantly faces away from Earth is that direct communication with the spacecraft is not possible. Instead messages to and from Chang’e 4 are being relayed by the Queqiao (Magpie Bridge) satellite, which is in a “halo orbit” on the other side of the moon.” — from a Chinese release