batch_1776154490 20260414111450000 National Academy of Sciences of Ukraine, Institute of Encyclopedic Research esu@esu.com.ua National Academy of Sciences of Ukraine, Institute of Encyclopedic Research Entsyklopedychnyi visnyk Ukrainy [The Encyclopedia Herald of Ukraine] Entsykl. visn. Ukr. 2706-9990 2707-000X 2025 17 Anatoly Zagorodny Presidium of the National Academy of Sciences of Ukraine (Kyiv, Ukraine)Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine (Kyiv, Ukraine) https://orcid.org/0000-0002-7953-6726 Ihor Huk Medical University of Vienna (Vienna, Austria) Anatoliy Negriyko Institute of Physics of the National Academy of Sciences of Ukraine (Kyiv, Ukraine) https://orcid.org/0000-0002-2954-5157 Ella Libanova Institute for Demography and Life Quality Problems of the National Academy of Sciences of Ukraine (Kyiv, Ukraine) https://orcid.org/0000-0001-7170-7159 Victor Zhovtyansky Institute of Gas, National Academy of Sciences of Ukraine, Kyiv, Ukraine https://orcid.org/0000-0002-9532-423X Roman Kushnir Shevchenko Scientific Society (Lviv, Ukraine); Pidstryhach Institute for Applied Problems of Mechanics and Mathematics of the National Academy of Sciences of Ukraine (Lviv, Ukraine) https://orcid.org/0000-0003-2749-6846 Iryna Matiash Institute of History of Ukraine, National Academy of Sciences of Ukraine (Kyiv, Ukraine) https://orcid.org/0000-0002-7565-1866 Tetiana Dobko Vernadsky National Library of Ukraine, National Academy of Sciences of Ukraine (Kyiv, Ukraine) https://orcid.org/0000-0002-5993-7856 Mykola Zhulynsky Shevchenko Institute of Literature of the National Academy of Sciences of Ukraine (Kyiv, Ukraine) https://orcid.org/0000-0003-1474-728X Maksym Strikhа Taras Shevchenko National University of Kyiv (Kyiv, Ukraine); V. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine (Kyiv, Ukraine) https://orcid.org/0000-0002-2380-0305 On 25 October 2025, the distinguished Ukrainian astronomer and geodesist, a leading specialist in astrometry and space geodynamics, and a prominent public and civic figure, Yaroslav Stepanovych Yatskiv, celebrated his 85th birthday. This “kaleidoscope” collection brings together brief sketches — vignettes by lead¬ing figures of Ukrainian science — that together form a portrait of the jubilarian. 2025 139 152 10.37068/evu.17.12 https://evu.encyclopedia.kyiv.ua/article/1722 https://evu.encyclopedia.kyiv.ua/doi/10.37068/evu.17.12.pdf