Apollo 17 Mission
Science Experiments - Lunar Ejecta and Meteorite
The Lunar Ejecta and Meteorites Experiment was deployed on Apollo 17 to study the nature of small particles striking the Moon. It contained three sensor plates oriented in different directions, allowing it to measure the velocity and direction of motion of impacting particles. It was expected that this experiment would detect both particles arriving from external sources, such as cometary debris and interstellar grains, as well as particles ejected from the Moon by other impacts. However, analysis of the results indicated that it primarily detected fine lunar dust grains being transported at slow speeds across the lunar surface.