Retroreflectors of MPAc

Two corner-cube retroreflectors - one high-fidelity model and the MPAc flight model.

MPAc (MoonLIGHT Pointing Actuator) is a next-generation lunar laser ranging payload that will allow scientists to measure the distance between Earth and the Moon with millimetre-level precision. Scheduled to fly aboard Intuitive Machines’ IM-3 mission to the Reiner Gamma region of the Moon early next year, MPAc will help reveal new details about the Moon’s interior and support even more sensitive tests of our understanding of gravity.