Up to 3000 international space experts as part of the world assembly of the Committee on Space Research (COSPAR) will gather in Sydney's new Darling Harbour Centre for what is affectionately known as the "Space Olympics" in 2020.
The city beat out Shanghai, Valencia, Prague and Lausanne to host the event, and could be the beginning of Australia launching its own space agency.
"While we have no formal space agency we do, in fact, have a space program," said Professor Russell Boyce, head of space research at UNSW Canberra.
"COSPAR 2020 will follow on from the International Astronautical Conference in Adelaide. All these activities in Australia should help reverse the brain drain in space science – these events are laying the seeds of an Australian space agency."