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
Thomas, Guillaume Frédéric (Junior Member) Spain Canada
Thomas, John H. United States United States
Thomas, Maik Germany Germany
Thomas, Nicolas Switzerland Switzerland
Thomas, Peter A. United Kingdom United Kingdom
Thomasson, Magnus Sweden Sweden
Thomasson, Peter United Kingdom United Kingdom
Thompson, A. Richard United States United States
Thompson, Donna Marie United States United States
Thompson, Ian United States United States
Thompson, Laird A. United States United States
Thompson, Rodger I United States United States
Thompson, William Thomas United States United States
Thomsen, Bjarne B. Denmark Denmark
Thomson, Alec J.M. (Junior Member) Australia Australia
Thorat, Kshitij H South Africa South Africa
Thorne, Kip S. United States United States
Thornley, Michele D. United States United States
Thorpe, James Ira United States United States
Thorsbro, Brian (Junior Member) Sweden Sweden
Thorsett, Stephen Erik United States United States
Thorstensen, John R. United States United States
Thoul, Anne A. Belgium Belgium
Thrane, Eric H Australia Australia
Thronson Jr, Harley Andrew United States United States
Thuan, Trinh Xuan United States United States
Thuillot, William France France
Thum, Clemens Spain Spain
Thurston, Mark Robert United Kingdom United Kingdom
Thyagarajan, Nithyanandan United States United States
TIAN, Feng China, Nanjing China, Nanjing
TIAN, Hui China, Nanjing China, Nanjing
TIAN, Wenwu China, Nanjing China, Nanjing
Tibaldo, Luigi France France
TIburzi, Caterina (Junior Member) Italy Italy
Tichá, Jana Czech Republic Czech Republic
Tifft, William G. United States United States
Tikhomolov, Evgeniy Canada Canada
Tikhonov, Nikolai Russian Federation Russian Federation
Tilanus, Remo P.J. United States Netherlands
Timothy, J. Gethyn United States United States
Tinetti, Giovanna United Kingdom United Kingdom
Tingay, Steven J. Australia Australia
Tinney, Christopher G. Australia Australia
Tiplady, Adrian John South Africa South Africa
Tipler, Frank Jennings United States United States
Tirsch, Daniela Germany Germany
Tiscareno, Matthew Steven United States United States
Tishkovets, Victor Ukraine Ukraine
Tissera, Patricia B. Argentina Argentina
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