1. Dynamics of Natural and Artificial Celestial Bodies
2. NASA Goddard Space Flight Center, “Wide Field Infrared Survey Telescope,” < https://wfirst.gsfc.nasa.gov/> (June 26 2017)
3. The Habitable Exoplanet Imaging Mission (HabEx);Menson,2017
4. HabEx space telescope optical system;Martin,2017
5. Overview of a telescope concept design for the Habitable-zone Exoplanet Direct Imaging Mission;Stahl,2017