China's experimental moon satellites beam back lunar imagery (video, photo)

Tiandu-1 and 2 are testing lunar communications and navigation tech. A pair of small experimental satellites have begun tests related to future lunar communication and navigation services for China's moon ambitions. The Tiandu-1 and Tiandu-2 satellites launched toward the moon along with the Queqiao-2 lunar communications relay satellite on a Long March 8 rocket on March 19. The latter spacecraft will support a major mission — the upcoming Chang'e 6 lunar far side sample return effort, which could launch as …