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: 14106 (of which 719 Junior members). Number of Active Individual and Junior Members in the IAU Directory: 11606.


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Name▼ Location NCA adherence
Östlin, Göran T. Sweden Sweden
Ostorero, Luisa Italy Italy
Ostriker, Eve C. United States United States
Ostriker, Jeremiah P. United States United States
Ostrowski, Michał Poland Poland
O'Sullivan, Créidhe Ireland Ireland
O'Sullivan, Denis F. Ireland Ireland
O'Sullivan, Ewan United States United States
O'Sullivan, Shane P Australia Australia
Oswalt, Terry D. United States United States
Oszkiewicz, Dagmara Anna Poland Poland
OTA, Naomi Japan Japan
Otarola, Angel United States United States
Otmianowska-Mazur, Katarzyna Poland Poland
O'Toole, SIMON J. Australia Australia
OTSUKA, Masaaki Japan China, Taipei
OTSUKI, Kaori Japan Japan
Ott, Juergen A. United States United States
Otulakowska-Hypka, Magdalena (Junior Member) Poland Poland
OUCHI , Masami Japan Japan
Oudmaijer, Rene United Kingdom United Kingdom
Ouellette, Nathalie Nguyen-Quoc (Junior Member) Canada Canada
Ovcharov, Evgeni Petev Bulgaria Bulgaria
Overzier, Roderik A. Brazil Brazil
Owen, Frazer Nelson United States United States
Owen, John Michael United States United States
Owen Jr, William Mann United States United States
Owers, Matthew S Australia Australia
Owis, Ashraf H Egypt Egypt
Owocki, Stanley Peter United States United States
OYA, Shin United States United States
OYABU, Shinki Japan Japan
OZAKI , Masanobu Japan Japan
Ozbey Arabaci, Mehtap United Kingdom Turkey
OZDEMIR, Sacit Turkey Turkey
OZEKI , Hiroyuki Japan Japan
Özel, Mehmet Emin Turkey Turkey
Ozguc, Atila Turkey Turkey
Özışık, Tuncay Turkey Turkey
Ozkan, Mustafa Turker Turkey Turkey
ÖZKARDEŞ, Burcu (Junior Member) Turkey Turkey
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