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.

For gender statistics click here.

Total number of IAU Individual and Junior members: 12754 (of which 1224 are Junior members). Number of Active Individual and Junior Members in the IAU Directory: 12383.


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Name Location NCA adherence▼
Sluse, Dominique Belgium Belgium
Sana, Hugues Belgium Belgium
Sundqvist, Jon O Belgium Belgium
Sayamanthula, Krishna Prasad India Belgium
Sterken, Christiaan L. Belgium Belgium
Siess, Lionel Belgium Belgium
Straatman, Caroline M. S. (Junior Member) Belgium Belgium
Sawant, Hanumant S. Brazil Brazil
Soares, Domingos Savio de Lima Brazil Brazil
Santiago, Basilio Xavier Brazil Brazil
Scalise Jr, Eugenio Brazil Brazil
Santos Jr., Joao F. C. Brazil Brazil
Schuch, Nelson Jorge Brazil Brazil
Selhorst, Caius Lucius Brazil Brazil
Sobreira, Paulo Henrique Azevedo Brazil Brazil
Spinelli, Patrícia Figueiró Brazil Brazil
Sfair, Rafael Brazil Brazil
Sodré, Laerte Brazil Brazil
Saraiva, Maria de Fatima Oliveira Brazil Brazil
Storchi-Bergmann, Thaisa Brazil Brazil
Semkov, Evgeni Hristov Bulgaria Bulgaria
Stoev, Alexey D. Bulgaria Bulgaria
Slavcheva-Mihova, Lyuba Stoyanova Bulgaria Bulgaria
Strigachev, Anton Atanasov Bulgaria Bulgaria
Stateva, Ivanka Kirtcheva Bulgaria Bulgaria
Stoyanov, Kiril Atanasov Bulgaria Bulgaria
Sato, Takashi Canada Canada
Scott, Douglas Canada Canada
Stetson, Peter B. Canada Canada
Sestito, Federico (Junior Member) Canada Canada
Speagle, Joshua Shen (Junior Member) Canada Canada
Sills, Alison I. Canada Canada
Sun, Jiayi (Junior Member) United States Canada
Sikora, James (Junior Member) Canada Canada
Sreenivasan, S. Ranga Canada Canada
Soriano, Bernardo M. Philippines Canada
Sher, David Canada Canada
Spencer, Locke Dean Canada Canada
Stagg, Christopher Canada Canada
Sivanandam, Suresh Canada Canada
Schieven, Gerald H. Moriarty Canada Canada
Smith, Nigel J.T. Canada Canada
Steinbring, Eric Canada Canada
Shelton, Ian Keith Canada Canada
Sivakoff, Gregory Robert Canada Canada
Scarfe, Colin David Canada Canada
Smith, Isaac B Canada Canada
Seaquist, Ernest R. Canada Canada
Sigut, T. A. Aaron Canada Canada
St-Louis, Nicole Canada Canada
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