Individual and Junior Members

Professional scientists whose research is directly relevant to some branch of astronomy are eligible to apply as Individual Members. Individual Members are, normally, admitted by the Executive Committee on the proposal of a National Member.

Junior scientists who have completed their PhD studies between 2015 and 2020 and who are in the initial phase of the career of a professional researcher in some branch of astronomy or a related field may be admitted to the Union by the Executive Committee as Junior Members, for a period not exceeding 6 years.

Individual and Junior Members listed in the IAU Directory have a valid, public email, and are affiliated to at least one Division. They are labeled as "Active Members". For corrections and updates, please contact Any members remaining Inactive for more than 3 years will be removed from the IAU lists.

Additionally, while only Active Members are listed in the IAU Directory, you may still search for Active, Inactive or Deceased Members in the search field to your right.

Total number of IAU Individual and Junior members: 11828 (of which 717 are Junior members). Number of Active Individual and Junior Members in the IAU Directory: 11574.


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Name▼ Location NCA adherence
Sterzik, Michael F. Germany Germany
Stetson, Peter B. Canada Canada
Stevance, Heloise F (Junior Member) New Zealand New Zealand
Stevens, Ian R. United Kingdom United Kingdom
Stevenson, Kevin B United States United States
Steves, Bonnie Alice United Kingdom United Kingdom
Stewart, Paul United Kingdom United Kingdom
Stewart, Susan Gessner United States United States
Stewart-Mukhopadhyay, Sarah T United States United States
Stiavelli, Massimo United States United States
Stier, Mark T. United States United States
Stierwalt, Sabrina United States United States
Stift, Martin Johannes United Kingdom Austria
Stil, Jeroen Maarten Canada Canada
Still, Martin D. United States United States
Stinebring, Daniel R. United States United States
Stirpe, Giovanna M. Italy Italy
St-Louis, Nicole Canada Canada
Stocke, John T. United States United States
Stockman Jr, Hervey S. United States United States
Stockton, Alan N. United States United States
Stodilka, Myroslav Ukraine Ukraine
Stoehr, Felix Germany Germany
Stoev, Alexey D. Bulgaria Bulgaria
Stojanović, Milan (Junior Member) Serbia, Republic of Serbia, Republic of
Stokes, Grant H. United States United States
Stollberg, Mark Thomas United States United States
Stolyarov, Vladislav A. United Kingdom United Kingdom
Stone, Edward C. United States United States
Stone, James McLellan United States United States
Stone, Remington P.S. United States United States
Stonkutė, Edita Lithuania Lithuania
Stonkutė, Rima Lithuania Lithuania
Storchi-Bergmann, Thaisa Brazil Brazil
Storey, John W.V. Australia Australia
Storey, Michelle C. Australia Australia
Storm, Jesper Germany Germany
Storrie-Lombardi, Lisa United States United States
Storrs, Alexander D. United States United States
Stott, John Philip United Kingdom United Kingdom
Stoyanov, Kiril Atanasov Bulgaria Bulgaria
Straal, Samayra Maryah (Junior Member) United Arab Emirates Netherlands
Straatman, Caroline M. S. (Junior Member) Belgium Belgium
Strachan, Leonard United States United States
Strafella, Francesco Italy Italy
Straižys, Vytautas P. Lithuania Lithuania
Strassmeier, Klaus G. Germany Germany
Stratta, Giulia Italy Italy
Straumann, Norbert Switzerland Switzerland
Straus, Thomas Italy Italy
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