Richard Lieu is a professor of physics and astronomy at the University of Alabama in Huntsville, specializing in cosmology and high-energy astrophysics. His research focuses on galaxy clusters, cosmic microwave background radiation, and the properties of dark matter and dark energy. Lieu has authored numerous peer-reviewed publications and is recognized for his contributions to observational astronomy, using both ground-based and space telescopes. He mentors graduate students and collaborates with international research teams on large-scale astronomical surveys.