Dr. Gezari joined the Goddard Space Flight Center in Greenbelt, Maryland in 1978. He received the NASA Medal for Exceptional Scientific Achievement in 1989 for his work on infrared array cameras and his research on the Galactic Center. Dr. Gezari has been a pioneer in the the development of several new fields of observational astronomy, including:
- First application of speckle interferometry (measuring diffraction limited stellar diameters in images blurred by the Earth's atmosphere).
- First 350 ?m observations, and the study of cool star forming clouds.
- Pioneered the use of array detectors for infrared astronomical imaging, especially at thermal infrared wavelengths (5-25 ?m).
- Produced the only infrared astronomical catalog in the field of observational astronomy.
In addition, Dr. Gezari has developed several useful compendia of astronomical research resources.