Lunar Laser Ranging  (LLR) Techniques Advance With First 2-Way Infrared Signals Between NASA LRO + Grasse Station

Goddard Space Flight Center And University Côte d’Azur Collaboration Results In First Infrared Photons (~200 Out Of Tens Of Thousands) Received Back From LRO Reflector (15 × 18 × 5 cm, Traveling ~1.6 km Per Second); LRO Array And Other LLR Important For Understanding Lunar Dust / Degradation Of Apollo & Lunokhod Surface Reflectors, Refining Lunar Distance & Orientation, ‘With Implications For Both Lunar Interior Properties And For Astrophysics And Fundamental Physics’; New LLR Opportunities To Come From Future Commercial And Human Moon Landings

Pictured: Researchers from this collaboration; Credits: GSFC, NASA, Université Côte d’Azur, Observatoire de la Côte d’Azur, IRD, Géoazur, CNRS-INSU, CNES, ANR, MIT EAPS, et al