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
Stenholm, Björn Sweden Sweden
Stanishev, Vallery D. Sweden Portugal
Sundin, Maria I. Sweden Sweden
Sandqvist, Aage Sweden Sweden
Scharmer, Goeran Bjarne Sweden Sweden
Soderhjelm, Staffan Sweden Sweden
Sollerman, Jesper Sweden Sweden
Stempels, Eric Sweden Sweden
Stenberg Wieser, Gabriella Sweden Sweden
Sterken, Veerle J. Switzerland Switzerland
Sargent, Mark Thomas Switzerland United Kingdom
Stadel, Joachim Gerhard Switzerland Switzerland
Schildknecht, Thomas Switzerland Switzerland
Schawinski, Kevin Switzerland Switzerland
Sharma, Rohit (Junior Member) Switzerland Switzerland
Schaerer, Daniel Switzerland Switzerland
Schmid, Hans Martin Switzerland Switzerland
Schmutz, Werner Switzerland Switzerland
Schober, Jennifer (Junior Member) Switzerland Switzerland
Straumann, Norbert Switzerland Switzerland
Stenflo, Jan Olof Switzerland Switzerland
Saha, Prasenjit Switzerland Switzerland
Ségransan, Damien Switzerland Switzerland
Shoyoqubov, Shoayub Tajikistan Tajikistan
Sanguansak, Nuanwan - Thailand Thailand
Surina, Farung Thailand Thailand
Suwannajak, Chutipong (Junior Member) Thailand Thailand
Saiz, Alejandro Thailand Thailand
Semenko, Eugene Thailand Russian Federation
Soonthornthum, Boonrucksar Thailand Thailand
Sawangwit, Utane Thailand Thailand
Siritanasak, Praween (Junior Member) Thailand Thailand
Sonbas, Eda Turkey Turkey
Saygac, Ahmet Talat Turkey Turkey
Selam, Selim O. Turkey Turkey
Sezer, Aytap Turkey Turkey
Saguner Rambaldi, Tenay Turkey Turkey
Syniavskyi, Ivan Ukraine Ukraine
Sobolev, Yakov M. Ukraine Ukraine
Savanevych, Vadym Yevgenievych Ukraine Ukraine
Sergeev, Aleksandr V. Ukraine Ukraine
Stanislavsky, Aleksander A. Ukraine Ukraine
Shulga, Oleksandr V. Ukraine Ukraine
Shepelev, Valeriy Ukraine Ukraine
Shevchuk, Mykola (Junior Member) Ukraine Ukraine
Slyusarev, Ivan G. Ukraine Ukraine
Sergijenko, Olga Ukraine Ukraine
Shubina, Olena (Junior Member) Ukraine Ukraine
Shevchenko, Vasilij Grigorievich Ukraine Ukraine
Svachii, Lidiia M. Ukraine Ukraine
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