Artists principle of the two Gravity Recovery and Interior Laboratory (GRAIL) spacecraft orbiting the moon. (Image credit: Lockheed Martin )They orbited the moon in tandem to map the moons gravity field. Still not enough space?
Artists principle of the two Gravity Recovery and Interior Laboratory (GRAIL) spacecraft orbiting the moon. (Image credit: Lockheed Martin )They orbited the moon in tandem to map the moons gravity field. Still not enough space?
