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About

Louis W. Sander is a leading figure in precision astronomical instrumentation, with a primary focus on high-resolution spectrography for exoplanet detection. His most notable contribution is the development of HARPS3, a state-of-the-art echelle spectrograph designed for the roboticized Isaac Newton Telescope. With a resolution of ~115,000 and a wavelength range of 380–690 nm, HARPS3 enables ultra-stable radial velocity measurements critical for discovering and characterizing Earth-like exoplanets. This work, detailed in his 2016 paper (34 citations), represents a key step in the Terra Hunting Experiment, a long-term search for terrestrial worlds. Sander’s expertise bridges engineering and astrophysics, driving innovations that push the boundaries of detection sensitivity. His impact is evident in the adoption of HARPS3’s design principles by subsequent instruments, cementing his role in advancing exoplanetary science and inspiring a new generation of instrument builders.