[5] Grace Cook attended a series of lectures in astronomy given by Joseph Hardcastle in the autumn of 1909.
[8] In January 1916 Cook was among the first group of women elected as Fellows of the Royal Astronomical Society.
With Joseph Alfred Hardcastle, Cook worked to identify and describe 785 New General Catalogue objects on the 206 plates of the John Franklin-Adams photographic survey.
During World War One Cook, with Fiammetta Wilson, temporarily headed the British Astronomical Association's Meteor Section.
[15] On 30 May 1922 she attended the RAS Centenary celebrations held at Burlington House where she appears in the group photograph identified as number 16.