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 10 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: 13562 (of which 533 Junior members). Number of Active Individual and Junior Members in the IAU Directory: 11067.


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Name Location NCA adherence▼
Okeke, Pius N. Nigeria Nigeria
Okeke, Francisca N. Nigeria Nigeria
Østensen, Roy H. Norway Norway
Ortiz-Carbonell, Ada Norway Norway
Orleanski, Piotr Poland Poland
Otulakowska-Hypka, Magdalena (Junior Member) Poland Poland
Ostrowski, Michał Poland Poland
Otmianowska-Mazur, Katarzyna Poland Poland
Oszkiewicz, Dagmara Anna Poland Poland
Ogłoza, Waldemar Poland Poland
Osório, Isabel Maria T.V.P. Portugal Portugal
Osório, José Pereira Portugal Portugal
Obridko, Vladimir N. Russian Federation Russian Federation
Onic, Dusan Serbia, Republic of Serbia, Republic of
Oozeer, Nadeem optional South Africa South Africa
Ödman, Carolina Johanna South Africa South Africa
Olivier, Enrico Adrian United Kingdom South Africa
Ortiz, Jose L. Spain Spain
Oliver, Ramón Spain Spain
Ortiz Gil, Amelia Spain Spain
Oscoz, Alejandro Spain Spain
Osorio, Mayra Spain Spain
O'Mullane, William Joseph Spain Spain
Olofsson, Hans Sweden Sweden
O'Connor, Evan P Sweden Sweden
Oja, Tarmo Sweden Sweden
Olofsson, Goeran S. Sweden Sweden
Östlin, Göran T. Sweden Sweden
Olofsson, Henrik A.O. Sweden Sweden
Olofsson, Kjell Sweden Sweden
Olberg, Michael Sweden Sweden
Oesch, Pascal A Switzerland Switzerland
Özışık, Tuncay Turkey Turkey
OZDEMIR, Sacit Turkey Turkey
Ozguc, Atila Turkey Turkey
Özel, Mehmet Emin Turkey Turkey
Ozkan, Mustafa Turker Turkey Turkey
Ozbey Arabaci, Mehtap United Kingdom Turkey
Oudmaijer, Rene United Kingdom United Kingdom
O'Brien, Paul Thomas United Kingdom United Kingdom
Oliver, Sebastian J. United Kingdom United Kingdom
Oliveira, Joana M. United Kingdom United Kingdom
O'Brien, Tim United Kingdom United Kingdom
Onions, Julian (Junior Member) United Kingdom United Kingdom
Osborne, Julian P. United Kingdom United Kingdom
Orford, Keith United Kingdom United Kingdom
Osborne, John L. United Kingdom United Kingdom
Oey, Sally United States United States
Orton, Glenn S. United States United States
Osmer, Patrick S. United States United States
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