IAU’s mission is to promote and safeguard the science of astronomy in all its aspects through international cooperation. In addition, IAU also works to promote astronomical education, research and public outreach actions towards the public.
The key activity of the IAU is the organization of scientific meetings. Every year the IAU sponsors nine international IAU Symposia.
Definition of fundamental astronomical and physical constants.
Promotion of educational activities in astronomy and informal discussions on the possibilities for future international large-scale facilities.
Furthermore, the IAU serves as the internationally recognized authority for assigning designations to celestial bodies and surface features on them.