About IAC 2025
The 76th International Astronautical Congress (IAC) was held in Sydney from 29 September to 3 October 2025 with over 7,000 delegates from 99 countries.
This prestigious event brought together the world's space community to access the latest advancements and trends, academic works, industry connections and partnership opportunities.
IAC 2025 was hosted by the Space Industry Association of Australia and co-hosted by the Australian Space Agency and New South Wales Government.
The theme was ‘Sustainable Space: Resilient Earth’. The Congress also highlighted Australia’s commitment to learning from indigenous knowledge and collaborating with First Nations communities on the deployment and use of space technologies.
"IAC 2025 is an opportunity to showcase Australia’s space ecosystem, as well as more deeply connect the global space community with the Indo-Pacific region.
Our region is filled with a dynamic mix of established and emerging space players, with much to offer the world."
~ Enrico Palermo, Head of the Australian Space Agency
The Daily from IAC 2025
The movers and shakers of the global space sector were in Sydney. Recap the day's highlights and our visual coverage from the ground.
Theme
Putting space sustainability front and centre
IAC 2025 presented a generational opportunity to showcase the rapid progress of Australia’s space industry and the importance of space-enabled services to the Australian way of life.
The event's theme ‘Sustainable Space: Resilient Earth’, explored the essential connection between space innovation and sustainability, focusing on three central areas:
- Space-based applications for Earth
- Sustainable space activities
- Sustaining life beyond Earth
Sustainable Space: Resilient Earth
Learn more about the theme of IAC 2025 Sydney that highlighted the essential connection between space innovation and sustainability.
Industry opportunities
IAC 2025 was the one place and time of the year where all global space actors come together.
The event covered all elements of space and highlighted the latest developments in academia and industry, as well as networking opportunities and potential partnerships.
IAC 2025 also united the sector with the end-users of space across a range of other industries — from agriculture to resources.
"Australia has many industries rich with transferable knowledge and innovative technologies that the space sector can draw from, as well as end users ready to benefit from space systems."
~ Enrico Palermo, Head of the Australian Space Agency
Building stronger partnerships
Building stronger partnerships
Grow your network across all areas of the space economy like manufacturing, communications, and other services.
Australia – a place for space
Australia – a place for space
Experience exciting new technical visits and associated tourism opportunities across Australia.
Extend your regional connections
Extend your regional connections
Australia provides a pivotal location to showcase the dynamic Indo-Pacific space community and its growing potential.
The Daily from IAC 2025
The movers and shakers of the global space sector are in Sydney. Let's recap the day's highlights and share with you our visual coverage from the ground.
Program details
Covering all space sectors and topics, IAC 2025 offered everyone the latest space information and developments in academia and industry, networking opportunities, meaningful connections, and potential partnerships.
IAC 2025 Space Week
Sydney also become a hub of science, culture, and imagination for the public. Running alongside the Congress, a city-wide IAC 2025 Space Week was held, where the public can participate in a range of immersive free events.
FAQs
Know everything you need to know about IAC 2025 though our Frequently Asked Questions (FAQs).
The International Astronautical Federation was the organiser of IAC 2025.
This year will mark the 76th edition of the event, which began in 1950.
Space Industry Association of Australia was the host of IAC 2025.
The Australian Space Agency and New South Wales Government were co-hosts of the event.
The 76th edition of IAC was be held in Sydney from 29 September to 3 October, 2025.
Over 7,000 delegates from 99 nations attended IAC 2025 in Sydney.
This prestigious event brings together the world's space community to access the latest advancements and trends, academic works, industry connections and partnership opportunities.
Yes, twice before. IAC 1998 was held in Melbourne and IAC 2017 was held in Adelaide.
The establishment of the Australian Space Agency was announced at the 68th edition in Adelaide.
The Agency commenced its operations on 1 July 2018.
Yes, IAC 2025 welcomed space enthusiasts of all ages, interests, and backgrounds.
The Congress held a free Public Day for visitors on Friday 3 October 2025. It saw over 19,500 space enthusiasts attended the event of which 11,000 were children.
The theme of IAC 2025 was ‘Sustainable Space: Resilient Earth’.
It covered space-based application for earth; sustainable space activities; and sustaining life off earth.
Visit IAC2025.org for more details.
The venue for the Congress was the International Convention Centre Sydney, on the beautiful Darling Harbour.
Yes, visitors got up close with real astronauts, heard their stories, and take home a memory of the stars.
