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Alasdair Fairley is a key figure in the development of next-generation astronomical instrumentation, with his work centered on the design and construction of the Multi-Object Optical and Near-infrared Spectrograph (MOONS) for the Very Large Telescope (VLT). His primary contributions lie in the mechanical and metrological engineering of this complex instrument, which will simultaneously observe 1,000 celestial targets using individually robotic fiber positioners. Fairley’s research focuses on the critical subsystems that enable MOONS’s unprecedented multiplexing capability, including the field corrector, the rotating front end, and the high-precision metrology system that ensures accurate fiber placement across the VLT’s 500 square arcminute field of view. His most cited work, “Rising MOONS” (2018, 17 citations), documents the instrument’s progression through final design review into full construction, highlighting the engineering challenges of combining the VLT’s 8-meter collecting power with massive spectroscopic multiplexing. Fairley’s contributions are essential to MOONS’s ability to conduct transformative surveys of the Milky Way and distant galaxies, making him a vital contributor to one of European astronomy’s most ambitious instrumentation projects.