Jackson-Gwilt Medal
The Jackson-Gwilt Medal is an award that has been issued by the Royal Astronomical Society (RAS) since 1897. The original criteria were for the invention, improvement, or development of astronomical instrumentation or techniques; for achievement in observational astronomy; or for achievement in research into the history of astronomy. From 2017 onwards, the history of astronomy category has been removed and transferred to a new award, the Agnes Mary Clerke Medal. The frequency of the medal has varied over time. Initially it was irregular, with gaps of between three and five years between awards. From 1968 onwards  it was awarded regularly every three years; from 2004 every two years; and since 2008 it has been awarded every year. The award is named after Hannah Jackson "née" Gwilt. She was a niece of Joseph Gwilt (an architect and Fellow of the RAS) and daughter of George Gwilt (another Fellow); Hannah donated the original funds for the medal. It is the second oldest award issued by the RAS, after the Gold Medal. List of winners. Source is unless otherwise noted.