Rate My Professor Ian Crossfield

His research centers on exoplanet formation, composition, detection, and characterization. Notable achievements include the first James Webb Space Telescope detection of carbon dioxide in an exoplanet atmosphere, confirmation of the first planet orbiting a white dwarf, and leadership of the OrCAS survey on the origins, compositions, and atmospheres of sub-Neptunes. Key publications include "OrCAS: Origins, Compositions, and Atmospheres of Sub-neptunes. I. Survey Definition" (2025, Astronomical Journal), "Mapping the SO2 Shoreline in Gas Giant Exoplanets" (2025), "Volatile-to-sulfur Ratios Can Recover a Gas Giant’s Accretion History" (2023, Astrophysical Journal Letters), "GJ 1252b: A Hot Terrestrial Super-Earth with No Atmosphere" (2022, Astrophysical Journal Letters), "A global cloud map of the nearest known brown dwarf" (2014, Nature), and the invited review "Observations of Exoplanet Atmospheres" (2015, Publications of the Astronomical Society of the Pacific). Crossfield has received the NASA Sagan Fellowship in 2014, Kavli Frontiers of Science Fellowship in 2015, AAS Doxsey Prize in 2013, and multiple AAS Chambliss Student Achievement Awards. He chairs the NASA Exoplanet Exploration Program Analysis Group Executive Committee since 2025, serves on the National Academies Committee on Astronomy and Astrophysics, and has given invited public lectures on exoplanet astronomy and the James Webb Space Telescope.