Mapping the early history of the moon
In 41st annual Killian Lecture, Maria Zuber describes looking deep into the moon’s interior to chart its early history.
GRAIL reveals a battered lunar history
Twin spacecraft create a highly detailed gravity map of the moon, finding an interior pulverized by early impacts.
MIT-developed ‘microthrusters’ could propel small satellites
As small as a penny, these thrusters run on jets of ion beams.