The 2021 UNIDIR Outer Space Security Conference (OS21) was held on 27 and 28 September 2021 both virtually and in person at the Palais des Nations in Geneva, Switzerland.

This two-day flagship event provided a unique forum for the diplomatic community — as well as experts with military, industry and academic backgrounds— to jointly consider challenges related to security in outer space and to exchange ideas regarding solutions. 

The discussion over the course of OS21 is summarised in this document, which also identifies key takeaway points.

Sponsor Organizations: Governments of the Russian Federation, the People’s Republic of China and the French Republic as well as the Fondation pour la Recherche Stratégique (with the financial support of the European Union) and the Secure World Foundation

Citation: María Garzón Maceda, Eleanor Krabill and Almudena Azcárate Ortega (2021) “2021 Outer Space Security Conference Report”, UNIDIR, Geneva,