The Closeby Habitable Exoplanet Survey (CHES) mission is proposed to discover habitable-zone Earth-like planets of nearby solar-type stars (∼10 pc away from our solar system) via microarcsecond relative astrometry. The major scientific objectives of CHES are: to search for Earth Twins or terrestrial planets in habitable zones orbiting 100 FGK nearby stars; further to conduct a comprehensive survey and extensively characterize nearby planetary systems, such as the number, true mass and three-dimensional orbit of habitable planets.



Ji, Jiang-Hui et al., 2022, CHES: A Space-borne Astrometric Mission for the Detection of Habitable Planets of the Nearby Solar-type Stars, Research in Astronomy and Astrophysics, 22, 072003