Japanese mission provides first gravity map of moon’s hidden half
Nearly 400 years after Galileo first viewed the moon’s nearside through a telescope, scientists still know relatively little about the moon’s hidden half — the hemisphere that always faces away from Earth. Now, researchers have for the first time mapped the gravitational field of the moon’s farside.
Over the past few decades, lunar spacecraft have revealed that the moon’s two hemispheres show striking differences. The visible nearside is covered with smooth, dark “seas” of volcanic material,