NASA spacecraft snaps mysterious 'surfboard' orbiting the moon. What is it?

A black-and-white image of a lunar orbiter traveling past the surface of the moon.

NASA's lunar orbiter has captured images of a surfboard-shaped object zooming past the moon.

The close encounter wasn't a UFO or an alien megastructure. Rather, NASA's Lunar Reconnaissance Orbiter (LRO) spotted South Korea's lunar orbiter Danuri zipping by as the two spacecraft circled the moon, NASA officials said in a statement.