Dear All,

As the organizer of the world’s premier space event, the International Astronautical Congress (IAC), I am excited to invite you to the 76th edition in Sydney, Australia from 29 September – 3 October 2025. The IAC has been organized twice before in the Commonwealth of Australia, most recently in 2017 with the 68th IAC in Adelaide, and the 49th IAC in Melbourne 1998. The IAF is delighted to return to the unique continent of Australia and to bring the IAC to the beautiful harbour city, Sydney. It is our pleasure to work with our dedicated member the Space Industry of Australia (SIAA) who has already proven to be an excellent host.

The theme for IAC 2025, “Sustainable Space : Resilient Earth“, will guide pivotal discussions on space-based applications for Earth, sustainable space activities, and life beyond our planet. This is a perfect theme for a country with a singularity of plant and animal life found nowhere else on Earth. We aim to spotlight the Indo-Pacific region, inspire the next generation of space professionals, and engage a wide range of industries. Sustainability in both Space and on Earth is of highest importance, and we want to foster a future where space-based applications and services help improve life for all on our planet.

IAC 2025 will be taking place at the International Convention Centre Sydney (ICC Sydney), centrally located in the heart of the vibrant Darling Harbour. ICC Sydney offers a striking contemporary design and cutting-edge technology across its versatile spaces. With its prime waterfront location and stunning city views, ICC Sydney promises to deliver a memorable experience for all attendees of IAC 2025.

The IAC is a unique event, being the one place and time of the year where all global space actors come together. Covering all space actors and topics, the Congress offers everyone the latest space information and developments in academia and industry, networking opportunities, contacts, and potential partnerships. This upcoming IAC in Sydney marks a significant opportunity to highlight the tremendous growth of both Australia’s space sector as well as the whole Indo-Pacific region. Join us and the whole space community in Sydney for the 76th International Astronautical Congress and be part of the journey!

Clay Mowry
President, International Astronautical Federation (IAF)