Astro-Grenadian philosophy, or Grenadian Astronism refers to the presence of Astronism in Grenada under management and philosophical jurisdiction of The Institution of The Philosophy of Millettism for Grenada, a national subsidiary for the worldwide Astronist Institution. The Institution of the Philosophy of Millettism for Grenada oversees the construction and maintenance of observatories and planetariums throughout its jurisdiction. 

Grenada is split into six parishes and is set to hold one Grand Observatory in the capital city of St George’s, which will be the only observatory in Grenada. This national branch of The Institution of The Philosophy of Millettism manages the official representation and depiction of Astronism throughout this territory, including efforts to protect the identity of the philosophy with the intention of further disseminating it throughout the territory. 

It is The Institution alone that is granted the status of proprietor to the philosophy in this territory as any other organisations or institutions proclaiming such a role are deemed as unauthorised proprietors and are therefore considered as part of the anti-Institutionist movement. 

History of Astronism in Grenada

Astronism is not recognised as a religion in Grenada as of November 2019 and the number of Astronists in the island nation is just 100 people. Religious freedom in the country Astronists has been designated as apathetic in the Astronist Institution's 2020 Astronist Freedom report.