| | Year | Events |
| 1908 | Ambartsumian was born on September 18 in Tiflis (Tbilisi) |
| 1919 | Read first books on astronomy and began taking interest in astronomy |
| 1920-1923 | Public lectures in Tbilisi on various topics of astronomy |
| 1920 | First 3 scientific works on nebulae, planetary systems and double stars, cosmogony, and Sun-spots (unpublished manuscripts) |
| 1924 | Visit to Yerevan; public lectures on Einstein's theory of relativity |
| 1924 | Public lecture in Tbilisi on Einstein's theory of relativity |
| 1924 | Finishing of the secondary school in Tbilisi |
| 1924-1925 | Student of the physical-mathematical department of the Leningrad (St. Petersburg) A.I. Gertsen Pedagogical Institute |
| 1926-1928 | Student of the Physical-Mathematical Department of the Leningrad (St. Petersburg) University |
| 1926 | First scientific publications (on the Solar physics; together with N.A. Kosirev; in German journals "Astronomische Nachrichten" and "Zeitschrift fur Physik") |
| 1927 | First papers on the radiative equilibrium in outer and inner layers of stars (together with N.A. Kosirev; in MNRAS) |
| 1927-1928 | Observing practice at Pulkovo Observatory; A.A. Belopolski becomes Ambartsumian's supervisor |
| 1928 | Graduated from the Physical-Mathematical Department of the Leningrad University, specialization "astronomy" (together with N.A. Kosirev, Eropkin, Khramov, Druri) |
| 1928-1931 | Post-graduate studies at the Pulkovo Observatory (supervisor: A.A. Belopolski) |
| 1929 | Publication of results on a Problem of the Theory of Eigenvalues (in "Zeitschrift fur Physik"), where for the first time a problem inverse to Sturm-Liuville's problem was formulated |
| 1929 | Visit to Armenia (together with his friends N.A. Kozirev, I. Kibel, and M.P. Bronstein) |
| 1929 | Participation in the conference on Quantum physics (Kharkov); talk on the quantization of the space |
| 1930 | An idea that not only the quanta of the electromagnetic field, photons, but also other particles (including particles having nonzero rest mass) may be born and disappear as a result of their ineraction with other particles (this idea lays in the basis of modern physics of the elementary particles and quantum field theory) (together with D.D. Ivanenko, in "Doklady Aced. Nauk SSSR") |
| 1930 | Suggestion that the atomic nuclei do not contain electrons and beside protons must contain neutral particles (together with D.D. Ivanenko; publications in "Doklady Aced. Nauk SSSR" and "Compte rendu hebd. Seances Acad. Sci. Paris") |
| 1931-1935 | Pulkovo Observatory research associate |
| 1931-1932 | Scientific Secretary of the Pulkovo Observatory |
| 1931-1934 | Lecturer (Associate Professor) of Astrophysics at the Leningrad State University (courses of Astrophysics, Theoretical Astrophysics, and Theoretical Physics) |
| 1931 | Married to Vera Feodorvna Klochikhina |
| 1932 | Suggestion of a new method for determination of the temperature of the planetary nebulae nuclei (paper on "The Radiative Equilibrium of a Planetary Nebulae" in MNRAS) |
| 1933-1934 | Head of the Division of Astrophysics of the LSU Astronomical Observatory |
| 1933 | Determination of masses of the envelopes thrown out by Novae stars (together with N.A. Kosirev; in "Zeitschrift fur Physik") |
| 1934 | Professor of the Leningrad State University (LSU) |
| 1934 | Foundation of the Chair of Astrophysics at LSU by V.A. Ambartsumian |
| 1934-1946 | Head of the first in the Soviet Union Chair of astrophysics at the Leningrad State University |
| 1934 | Participation in the I All-Union Astronomic-Geodesic Congress (Moscow, January); talk "Inner Structure and Evolution of Stars" |
| 1935 | Scientific degree of Doctor of physical-mathematical sciences (without defense of thesis) |
| 1936 | Derivation of the Space Velocities Distribution Function of the Stars from the Observed Radial Velocities (in MNRAS) |
| 1936 | Existence of the great number of white dwarf stars in the Galaxy was proven (together with G.A. Shain; in "Astronomisheski Zhournal") |
| 1936 | Visit to Abastumani Astrophysical Observatory for collaboration with Georgian astronomers; lectures |
| 1936-1937 | Based on the statistics of double stars, the incorrectness of the generally accepted estimate of the age of our Galaxy obtained by prominent English scientist James Jeans (so-called "long scale") was shown and a new estimate of its age was given (10 billion years as an upper limit, so-called "short scale"); in a discussion started in "Nature" (England) and "Astronomicheski Zhournal" (USSR) |
| 1937 | Visit to Abastumani Astrophysical Observatory for collaboration with Georgian astronomers (Gordeladze, et al.); lectures |
| 1937-1944 | Scientific Head of the Yerevan Astronomical Observatory |
| 1938 | Principles of the statistical mechanics of stellar systems; it was proven that open star clusters disintegrate during about 1 billion years (in "Uch. Zap. LGU") |
| 1938 | The nature and the clumpy structure of the Galactic absorbing matter was proven (together with Sh.G. Gordeladze; "Bulletin Abastumani Obs.") |
| 1939 | Corresponding member of the USSR Academy of Sciences |
| 1939 | Visit to Abastumani Astrophysical Observatory for consultations; lectures and seminars |
| 1939 | Publication of the first in the Soviet Union and the first Russian textbook "Theoretical Astrophysics" |
| 1939-1941 | Director of the Astronomical Observatory of the Leningrad State University |
| 1940 | Member of the Communist Party of the Soviet Union (CPSU) |
| 1940 | Title of Honorary Scientist of the Armenian SSR |
| 1941 | Visit to Tbilisi for participation in opening of the Georgian Academy of Sciences |
| 1941-1943 | Pro-Rector of the Leningrad State University on scientific affairs |
| 1941-1943 | Head of the Scientific-Research branch of the University, evacuated to Elabuga (Tatar ASSR) |
| 1941 | Moving with family and colleagues from Leningrad to Elabuga (Tatarian ASSR) |
| 1941-1942 | Development of the principle of invariance, a new theory of light scattering in turbid medium (in "Journal of Physics" and "Izv. Acad Sci. USSR") |
| 1943 | Foundation of the Armenian Academy of Sciences (in the absence of Ambartsumian) |
| 1943 | Full member (also Founding member) of the Armenian SSR Academy of Sciences |
| 1943-1947 | First Vice-President of the Armenian SSR Academy of Sciences |
| 1943 | Visit to Yerevan for celebration of foundation of the Armenian Academy of Sciences |
| 1944 | Visit to Moscow for consultations with the Presidium of the USSR Academy of Sciences |
| 1944 | The principles of the theory of fluctuations (in "Doklady Acad. Sci. USSR") |
| 1944 | Moving with family from Elabuga (Tatarian ASSR) to Yerevan |
| 1944 | First visit to Byurakan for study of the site and the astroclimate |
| 1944 | Labour Red Banner Order for outstanding services in preparing astronomy specialists and on the occasion of 125th anniversary of the Leningrad University |
| 1944 | Foundation of the Chair of Astrophysics at YSU by V.A. Ambartsumian |
| 1944-1994 | Head of the newly created Chair of Astrophysics at the Yerevan State University |
| 1944-1994 | Director of the Yerevan Astrophysical Observatory of the Armenian SSR Academy of Sciences |
| 1944-1994 | Chairman of the Astronomical Commission of the USSR Academy of Sciences |
| 1944-1959 | Editor-in-Chief of the journal "Doklady Arm. SSR Acad. Sci." ("Reports of the Armenian SSR Academy of Sciences") |
| 1944-1979 | Member of the Editorial Board of the "Astronomicheski Zhournal" of the USSR Acad. Sci. ("Soviet Astronomy", later "Astronomy Reports") |
| 1945 | Visit to Moscow for celebration of the 220th anniversary of the USSR Acad. Sci. |
| 1945 | Lenin Order for outstanding services in development of science and engineering and on occasion of the 220th anniversary of the USSR Acad. Sci. |
| 1946 | First foreign trip; Paris (one night) and London for celebrations devoted to the 300th anniversary of Isaac Newton. Visit to Cambridge; meeting Paul Dirac and Spenser Jones. Return through Berlin; visiting Zeiss factory for the 1m Schmidt telescope |
| 1946 | Member of the International Astronomical Union (IAU) |
| 1946 | USSR (Stalin) State prize for creation of the new theory of light scattering in turbid medium |
| 1946 | Foundation of the Byurakan Astrophysical Observatory (BAO) by V.A. Ambartsumian |
| 1946-1988 | Director of the newly founded Byurakan Astrophysical Observatory (BAO) of the Arm. SSR Acad. Sci. |
| 1946 | Foundation of the journal "Communications of the Byurakan Observatory" by V.A. Ambartsumian |
| 1946-1985 | Editor-in-Chief of the "Communications of the Byurakan Observatory" |
| 1947 | Discovery of the stellar associations, stellar systems of a new type, and hypothesis on the group origin of stars (in the talk "Evolution of Stars and Astrophysics" at the Jubilee session of the Arm. SSR Acad. Sci.) |
| 1947 | Honorary member of the American Astronomical Society (AAS) |
| 1947 | Professor of the Yerevan State University (YSU) |
| 1947-1951 | Deputy of the Armenian SSR Supreme Soviet |
| 1947-1993 | President of the Armenian SSR Academy of Sciences |
| 1947-1956 | Chairman of the Editorial-Publishing Council of the Armenian SSR Academy of Sciences |
| 1947-1972 | Member of the Committee on Lenin and USSR State prizes in the field of science and engineering at the USSR Council of Ministers |
| 1947-1996 | Chairman of the Administrative Board of the "Knowledge" society of the Armenian SSR |
| 1948 | Member of the Central Committee of the Communist Party of the Armenian SSR |
| 1948 | Participation in the IAU GA VII (Zurich, Switzerland, 11-18 Aug); talk "On the Patchy Structure of the Interstellar Absorbing Layer" |
| 1948-1955 | Vice-President of the International Astronomical Union (IAU) |
| 1949 | Visit to Abastumani; lecture on Stellar Associations |
| 1949-1953 | Chairman of the Armenian Republican Committee of supporters of peace |
| 1949 | Head of the Armenian delegation at the All-union conference of supporters of peace in Moscow |
| 1949 | Prediction of the phenomenon of expansion of the stellar associations (in "Astronomicheski Zhournal") |
| 1950 | USSR (Stalin) State prize for the discovery and study of new type of stellar systems, "stellar associations" (together with B.E. Markarian) |
| 1950 | Head of the Soviet delegation at the international conference on Astronomical Constants in Paris |
| 1950 | Visit to Berlin for participation in the celebrations of the 250th anniversary of the German Acad. Sci. in Berlin |
| 1950 | Participation in the session of the IAU Executive Committee in Stockholm |
| 1950 | Finishing of the construction of Ambartsumian's house in Byurakan and moving there |
| 1950-1989 | Deputy of the USSR Supreme Soviet of III, IV, V, VI, VII, VIII, IX, X, and XI convocations |
| 1951 | Participation in the First Conference on Problems of Cosmogony (Moscow, 16-19 Apr) |
| 1951 | Statistics of the Trapezium type systems and a proof of disintegration of the young stellar systems (in "Doklady Arm. SSR Acad. Sci.") |
| 1951 | Participation in the session of the IAU Executive Committee in Paris |
| 1951 | First conference in Byurakan: "Stellar Associations and the Distribution of Hot Giants" (12-16 Nov) |
| 1952 | Participation in the Peoples Congress for defense of peace in Vienna |
| 1952 | Delegate of the CPSU XIX congress |
| 1952 | Head of the Soviet delegation at the IAU GA VIII (Rome, Italy, 4-13 Sep); Introductory talk at the sympoisum on evolution of stars |
| 1952-1964 | Chairman of the Commission on Cosmogony of the USSR Acad. Sci. |
| 1952 | Participation in the Second Conference on Problems of Cosmogony (Moscow, 19-22 May); talk "On the Origin and Development of Stars and Stellar Systems" |
| 1952 | Participation in the 10th All-Union astronomical conference (Pulkovo, Leningrad); talk "Problems of Astronomical Study of the Stellar Associations" |
| 1952 | Publication of the textbook "Theoretical Astrophysics" (co-authors: E.R. Mustel, A.B. Severnyi, V.V. Sobolev) |
| 1953 | Head of the Soviet delegation at the International astronomical conference (later named as IAU Symp. #1) on "Coordination of Studies on the Galactic Structure (Groningen, The Netherlands, 17-22 June) |
| 1953 | Head of the Soviet delegation at the International astronomical conference on the Fundamental Problems of the Stellar Classification (Paris, France, 29 June - 3 July) |
| 1953 | Labour Red Banner Order for long service and stainless work |
| 1953 | Participation in the Third Conference on Problems of Cosmogony (Moscow, 14-15 May); Summary Talk |
| 1953 | Full member of the USSR Academy of Sciences |
| 1953 | Honorary member of the Royal Astronomical Society (Great Britain) |
| 1953 | Participation in the V Liege international astrophysical symposium: "Dust in the Astronomical Objects"; talk "On the Origin of Stars" |
| 1953 | Corresponding member of the Royal Society (Academy of sciences) of Belgium (Liege) |
| 1953 | Member of the Astronomical Society of the Pacific (ASP) |
| 1954 | Head of the Soviet delegation at the VI Liege international astrophysical symposium: "Solid Particles in Cosmic Objects"; talk "On Comet-like Nebulae" |
| 1954 | On the invitation of the London University Council, gave a few lectures on stellar dynamics. Gave astrophysical colloquiua at the Universities of Manchester, Edinburgh, and Saint-Andrews |
| 1954 | Showed the nonthermal nature of the continuous emission observed in the spectra of non-stable stars and put forward a hypothesis about new possible sources of stellar energy ("The Continuous Emission and Sources of Stellar Energy", in "Commun. BAO") |
| 1954 | Participation in the Fourth Conference on Problems of Cosmogony (Moscow, 26-29 Oct); Introductory talk and Concluding Remarks, talk "On the Nature of T Tauri Stars" |
| 1955 | Participation in the II Congress of the All-Union Astronomic-Geodesic Society ("VAGO", Moscow); talk "Problems of Modern Astrophysics" |
| 1955 | Mission to the GDR (Berlin, Dresden, Jena) in the parliamentary delegation of the USSR Supreme Soviet |
| 1955 | Participation in the World Assembly of supporters of peace in Helsinki |
| 1955-1988 | Member of the Presidium of the USSR Acad. Sci. |
| 1955 | IAU Symp. #3: "Non-Stable Stars", Dublin, Ireland, Sep 1 (not attended personally), at the IAU GA IX (Dublin, Ireland, 29 Aug - 5 Sep); talk "Stars of T Tauri and UV Ceti types and the Phenomenon of Continuous Emission" (presented by A.G. Masevich) |
| 1955 | IAU Symp. #5: "The Large-Scale Structure of the Galactic System", Dublin, Ireland, Sep 2 (not attended personally), at the IAU GA IX (Dublin, Ireland, 29 Aug - 5 Sep); talk "Some Remarks on Multiple Galaxies" (presented by A.G. Masevich) |
| 1955 | Member of the Council on the coordination of works of Academies of Sciences of the Union Republics |
| 1956 | Participation in the Fifth Conference on Problems of Cosmogony (Moscow, 9-12 Mar); talk "On the Nature of Radio Sources", the new physical interpretation of radiogalaxies |
| 1956 | First ideas concerning the hypothesis on activity of the galactic nuclei |
| 1956 | Corresponding member of the Academy of Sciences of Austria |
| 1956 | Janssen Medal of the French Astronomical Society for scientific services |
| 1956 | Delegate of the CPSU XX congress |
| 1956 | Official inauguration of the Byurakan Observatory. Symposium: "Non-Stable Stars" (Byurakan, 20-22 Sep); several talks. In one of them for the first time cosidered inverse Compton-effect as a possible mechanism of radiation of non-stable stars |
| 1956 | Member of the Committee on Lenin prizes |
| 1956 | Visit to the USA (Palomar, Lick, and other observatories); seminars |
| 1957 | On the invitation of the Austrian Academy of Sciences participated in the annual meeting of the Academy. Gave several lectures at the universities of Vienna, Innsbruk, and Graz, as well as at the Vienna Observatory |
| 1957 | Participation in the Sixth Conference on Problems of Cosmogony (Moscow, 5-7 June); talk "On some Data of Extragalactic Astronomy" |
| 1957 | Head of the Soviet delegation at the III Symposium on Cosmic Gas Dynamics (Cambridge, USA); talk "To the Problem of the Mechanism of the Origin of Stars in Stellar Associations"; visiting the largest American observatories: Mt. Palomar, Mt. Wilson, and Lick, where gave several lectures |
| 1957 | Corresponding member of the German Academy of Sciences in Berlin |
| 1957 | Foreign honorary member of the American Academy of Arts and Sciences (Boston) |
| 1958 | Participation in the XI Solvay conference on Problems of Large Universe (Bruxelles, Belgium); talk: "On the Evolution of Galaxies"; gives evidences supporting for the first time put forward by him understanding on the cosmogonic activity of the galactic nuclei |
| 1958 | Participation in the All-Union Conference on the Theory of Probability and Mathematical Statistics (Yerevan); Introductory Talk and talk: "On the Fluctuations in the Apparent Distribution of Stars" |
| 1958 | Participation in the All-Union Conference on the Philosophical Problems of the Natural Science (Moscow); talk: "Some Methodological Questions of Cosmogony" |
| 1958-1974 | Corresponding member of the Academy of Sciences of France |
| 1958 | Chairman of the Organizing Commmittee and Head of the Soviet delegation at the IAU GA X (Moscow, 12-20 Aug) |
| 1958 | Lenin Order for outstanding services in the field of development of astronomy and on the occasion of his 50th anniversary |
| 1958 | Ambartsumian's 50th anniversary: publication of the book "Viktor Amazaspovich Ambartsumian" (bibliographic reference book, comp. by E.S. Vlasyan and S.S. Yazichyan, Yerevan, Arm. SSR Acad. Sci., 121p.) |
| 1959 | Member of the USA National Academy of Sciences |
| 1959 | Foreign member of the German Academy of Naturalists ("Leopoldina") in Halle (GDR) |
| 1959 | Honorary member of the Royal Astronomical Society of Canada |
| 1959 | Participation as a member of the delegation of the USSR Acad. Sci. in the National Science Congress of India in Delhi |
| 1960 | Catherine Bruce gold medal of the Astronomical Society of the Pacific (California, USA) for outstanding services in the field of astronomy |
| 1960 | Gold medal of the Great Britain Royal Astronomical Society for works in the field of theoretical astrophysics and stellar astronomy. On the occasion of the official award of the medal Ambartsumian gave a George-Darwin lecture at the session of the Society in London "Evolution of Stellar Systems" |
| 1960 | Medal "For Labour Valour" |
| 1960 | Development of the theory of superdense degenerate stellar configurations (together with G.S. Sahakyan, 3 papers in "Astronomicheski Zhournal") |
| 1960 | Installation of the 1m Schmidt telescope in Byurakan |
| 1960 | Publication of the 1st and 2nd volume of Ambartsumian's collection of papers (ed. V.V. Sobolev) |
| 1961 | Participation in the IAU Symp. #15: "Problems of Extragalactic Research" (Santa-Barbara, CA, USA, 10-12 Aug); talk "Multicolour Photography of Galaxies at the Crimean Observatory" |
| 1961 | Head of the Soviet delegation at the IAU GA XI (Berkeley, CA, USA, 15-24 Aug). Invited Discourse: "Problems of Extra-Galactic Research" |
| 1961-1964 | President of the International Astronomical Union (IAU) |
| 1961 | Delegate of the CPSU XXII congress |
| 1961 | N.S. Khrushchev's visit to Byurakan (together with Ya.N. Zarobyan, et al.) |
| 1962 | Visit to Bucarest (Romania) for discussions and collaboration |
| 1962 | Chairman of the IAU Executive Council Meeting in Yerevan |
| 1963 | Head of the Soviet delegation at the IAU Symp. #20: "The Galaxy and the Magellanic Clouds" (Canberra, Australia, 18-28 Mar); talk: "Superassociations in Distant Galaxies"; in Australia also gave public lectures |
| 1963 | Title of Honorary Doctor (honoris causa) of the Australian National University (Canberra) |
| 1963 | On the way back from Australia visited Indonesia (Bandung), where participated in the symposium "Standards for Stellar Photometry and Spectral Classification"; Address from the IAU President |
| 1963 | Visit to the USA (Washington, Boston, Pasadena) for celebrations, devoted to the 100th anniversary of the USA National Acad. Sci.; Address from the IAU President |
| 1963 | Participation in the session of the ICSU Executive Committee in Prague as the IAU President |
| 1964 | Head of the Soviet delegation at the IAU GA XII (Hamburg, FRG, 25 Aug - 3 Sep); talk at Joint Discussion on radiogalaxies "Some Remarks on the Nature of the Nuclei of Galaxies" |
| 1964 | First All-Union Conference on the Problem of Extraterrestrial Civilizations (Byurakan, 20-23 May); Introductory talk |
| 1964 | Participation in the XIII Solvay conference on Problems of Structure and Evolution of Galaxies (Bruxelles, Belgium); Introductory talk: "On the Nuclei of Galaxies and Their Activity" |
| 1965 | Foundation of the All-Union journal "Astrofizika" by V.A. Ambartsumian (published in Yerevan and translated into English as "Astrophysics") |
| 1965-1987 | Editor-in-Chief of the newly founded journal "Astrofizika" ("Astrophysics") |
| 1965 | Title of Honorary Doctor (honoris causa) of the Paris (Sorbonne) University as a recognition of services to world science. Several lectures during his visit to Paris |
| 1965 | On the invitation of the Hungarian Acad. Sci. visited Hungary (Budapest). Several lectures at the Acad. Sci. and the Budapest Astronomical Observatory |
| 1965 | Participation in the Second Soviet Gravitational conference: "Problems of Gravitation" (Tbilisi, 20-28 Apr); talk: "The Nuclei of Galaxies and Their Activity" |
| 1965 | Participation in the IV Congress of the All-Union Astronomic-Geodesic Society ("VAGO", Riga, Oct); talk: "Perspectives of Development of Modern Astrophysics" |
| 1965-1974 | Chairman of the Editorial Board of the first "Armenian Soviet Encyclopedia" |
| 1965-1987 | Chairman of the Scientific-Publishing Council of the first "Armenian Soviet Encyclopedia" |
| 1966 | IAU Symp. #29: "Non-Stable Phenomena in Galaxies" (Byurakan, USSR, 4-12 May); Introductory talk: "Non-Stable Phenomena in Galaxies"; Chairman of SOC |
| 1966 | Delegate of the CPSU XXIII congress |
| 1966 | Head of the Soviet delegation at the session of the ICSU Executive Council (Bombay, India) |
| 1966 | Member of the Executive Committee of the International Council of Scientific Unions (ICSU) |
| 1967 | Title of Honorary Doctor (honoris causa) of the Liege University (Belgium) |
| 1967 | Head of the Soviet delegation at the IAU GA XIII (Prague, Czechoslovakia, 22-31 Aug) |
| 1967 | Title of Honorary Doctor (honoris causa) of the Carlov (Praha) University (Czechoslovakia). Lecture during the award ceremony at the IAU General Assembly in Prague |
| 1967 | Head of the Soviet delegation at the session of the ICSU Executive Committee in Rome |
| 1967 | Member of the Italian National Academy of Sciences "Dei Lincei" |
| 1968 | Visit to Hungaria (Budapest) as the head of the Arm. SSR Acad. Sci. for signing contract of scientific collaboration between the Hungarian and Armenian academies of sciences |
| 1968 | Participation in the XIV International Philosophic Congress (Vienna, Austria); talk "Contemporary Natural Science and Philosophy" |
| 1968 | Participation in the ICSU General Assembly (Paris, France); elected ICSU President |
| 1968-1970 | President of the International Council of Scientific Unions (ICSU) (first term) |
| 1968 | Ambartsumian's 60th anniversary: International Symposium "Stars, Nebulae, Galaxies" in Byurakan (16-19 Sep); publication of the book "Viktor Ambartsumian" by L.V. Mirzoyan (Yerevan, "Giteliq", 1968, 61p., in Armenian) |
| 1968 | Prediction of the total number of flare stars in a cluster based on the number of the observed flares (talk presented at the Symposium in Byurakan "Stars, Nebulae, Galaxies": "On the Statistics of Flare Objects") |
| 1968 | Title of the Hero of Socialist Labour with investiture of Lenin Order and Gold medal "Hammer and Sickle" for great services in the development of astronomical science and on the occasion of his 60th anniversary |
| 1968 | Title of Honorary Scientist of the Georgian SSR |
| 1969 | Publication of the book "Problems of Evolution of the Universe" in Armenian and Russian |
| 1969 | Cyril & Mefodiy Order of I degree by Presidium of the National Assembly of the People's Republic of Bulgaria for successes in development of science |
| 1969 | Honorary member of the London Royal Society (Great Britain Academy of Sciences) |
| 1969 | Honorary member of the Cambridge Philosophical Society (England) |
| 1969 | On the invitation of the German Acad. Sci. in Berlin visited GDR (Berlin and Potsdam) as the Head of the delegation of the Arm. SSR Acad. Sci.; talk at the Academy: "On the Development of Science in Soviet Armenia" |
| 1969 | Honorary member of the Society of Theoretical and Applied Mechanics of Poland |
| 1969 | Visit to Italy: Padua, Armenian Island St. Lazar near Venice |
| 1970 | S.I. Vavilov medal by the Presidium of Administration of the All-Union Society "Knowledge" for services in popularization of political and scientific knowledge |
| 1970 | Participation in the symposium "The Nuclei of Galaxies" (Rome, Italy); Introductory talk |
| 1970 | Head of the Soviet delegation at the IAU GA XIV (Brighton, UK, 18-27 Aug); visit to Jodrell Bank |
| 1970 | Member of the Royal Netherlands Academy of Sciences |
| 1970 | Participation in the ICSU General Assembly (Madrid, Spain); Summary Report on the ICSU activities; elected ICSU President for the second term |
| 1970-1972 | President of the International Council of Scientific Unions (ICSU) (second term) |
| 1970 | Gold medal of the Slovak Academy of Sciences for outstanding scientific and social activity and for services to humanity |
| 1970 | Participation in the II All-Union conference on Philosophical Problems of the Natural Science (Moscow); talks "Problems of Methodology of the Natural-Science Search" (together with V.V. Kazyutinski) and "Materialistic Dialectics - Methodology and Logic of the Developments of Modern Natural Science" |
| 1970- | Chairman of the Committee of the Armenian SSR State prizes in the field of science and engineering at the Armenian SSR Council of Ministers |
| 1971 | Delegate of the CPSU XXIV congress |
| 1971 | On the invitation of the USA Congress visited USA (Washington) as the ICSU President; participated in the session of the Commission of Science and Astronautics of the Congress at the discussion of the problem of the development of science; talk: "New Mechanisms of the Future Collaboration"; visited the Green Bank Radioastronomical Observatory |
| 1971 | The first Soviet ultraviolet space observatory "Orion-1" (designed and built in Byurakan by G.A. Gurzadyan, et al.) operated onboard Soviet spacecraft |
| 1971 | Member of the Royal Academy of Sciences of Denmark |
| 1971 | Founding member and member of the Council of the USSR Philosophical Society |
| 1971 | Helmholtz medal by the German Academy of Sciences in Berlin (GDR) for successes in the field of natural sciences |
| 1971 | M.V. Lomonosov Gold medal, the highest award of the USSR Acad. Sci., by the Presidium of the Academy for outstanding achievements in the field of astronomy and astrophysics; Lomonosov talk at the award ceremony: "Non-Stationary Phenomena in the World of Stars and Galaxies" |
| 1971 | First international (Soviet-American) symposium on "The Problem of Extra terrestrial Civilizations and Communication with them" (Byurakan, 6-11 Sep); Introductory talk |
| 1971 | Participation in the IAU Col. #15: "New Directions and New Frontiers in Variable Star Research" (Bamberg, FRG, 31 Aug - 3 Sep); talk: "Flare Stars" (together with L.V. Mirzoyan) |
| 1972 | On the invitation of the University of Cologne visited FRG (Cologne, Bonn, Munich, Heidelberg) as the head of the delegation of the Armenian SSR Acad. Sci.; several talks about the activities of the Byurakan Astrophysical Observatory |
| 1972 | Participation in the ICSU General Assembly (Helsinki, Finland); Summary Report on the ICSU activities |
| 1972 | Honorary member of the Azerbaijan SSR Acad. Sci. |
| 1972 | Title of Honorary Doctor (honoris causa) of the Warsaw University (Poland) |
| 1972 | In honour to V.A. Ambartsumian, the asteroid #1905 was named "Ambartsumian" (discovered by T.M. Smirnova in Crimea on 14 May 1972) |
| 1972 | Honorary member of the Royal Academy of Sciences of Sweden |
| 1973 | Head of the Soviet delegation at the IAU Extraordinary GA (Torun, Warsaw, Krakov; Poland, 4 Sep), devoted to the 500th anniversary of Copernicus |
| 1973 | The second Soviet ultraviolet space observatory "Orion-2" (designed and built in Byurakan by G.A. Gurzadyan, et al.) operated onboard Soviet spacecraft |
| 1973 | Order of "Service" of the III degree by the Government of Poland for outstanding scientific services |
| 1973 | Title of Honorary Doctor (honoris causa) of the Nicolaus Copernicus Torun University (Poland) |
| 1973 | Participation in the General Meeting of the USSR Acad. Sci., devoted to the 500th anniversary of Copernicus; talk "Copernicus and Modern Astronomy" |
| 1973 | Honorary member of the New-York Academy of Sciences |
| 1974 | Foreign member of the Academy of Sciences of Bulgaria |
| 1974 | Participation in the IAU Symp. #67: "Variable Stars and Stellar Evolution" (Moscow, USSR, 29 Jul - 4 Aug); talk: "Flare Stars in Star Clusters and Associations" (together with L.V. Mirzoyan) |
| 1974 | Kotenius Gold medal by the German Academy of Naturalists ("Leopoldina") in Halle (GDR) |
| 1974 | Visit to Argentina (Buenos-Aires, Cordoba, La-Plata, San-Juan, Rossario); lectures and consultations at the universities and observatories on astrophysics and extragalactic astronomy |
| 1974 | Foreign member of the Cordoba (Argentina) Academy of Sciences |
| 1974 | Sarmiento medal by the Cordoba (Argentina) Academy of Sciences for scientific and pedagogical services |
| 1974 | Title of Honorary Doctor (honoris causa) of the La-Plata University (Argentina) |
| 1974 | Lenin Order for scientific services on the occasion of the 250th anniversary of the USSR Acad. Sci. |
| 1974-1987 | Chairman of the United Scientific Council on Astronomy of the USSR Acad. Sci. |
| 1974 | Talk at the conference devoted to the 100th anniversary of the Tashkent Observatory: "On the Role of the Non-Stationary Processes in the Evolution of Galaxies" (presented by H.M. Tovmassian) |
| 1975 | Publication of the book "Viktor Amazasp Ambartsumian" (bibliographic reference book, comp. G.N. Finashina, Moscow, Nauka, 136p.) |
| 1975 | Order of "Banner" of the Hungarian People's Republic |
| 1975 | Visit to GDR (Berlin and Weimar) for celebrations of the 275th anniversary of the German Acad. Sci. in Berlin; talk: "On the Evolutionary Processes in the Universe" |
| 1975 | Participation in the 3rd European Regional IAU Meetings (Tbilisi, USSR, 1-5 July); talks: "The Role of the Nuclear Activity in the Overall Evolutionary Processes in Galaxies" and "Compact Groups of Compact Galaxies" |
| 1975 | Participation in the conference on the Problems of Philosophical Struggle in Modern Natural Science (Moscow); talk "Revolution in Modern Astronomy and Problems of Outlook on Life" (together with V.V. Kaziutinski) |
| 1976 | Participation in the 2nd Joint Colloquium of the Byurakan and Abastumani (Georgia) astrophysical observatories (Abastumani, May); talk |
| 1976 | Delegate of the CPSU XXV congress |
| 1976 | Foreign member of the Academy of Sciences of India |
| 1976 | Installation of the 2.6m telescope in Byurakan (at that time one of the world largest telescopes) |
| 1976 | International Symposium: "Flare Stars" (Byurakan, 5-8 Oct), dedicated to official opening of the 2.6 m telescope; talk "Results of Observations of Flare Stars in Stellar Aggregates" (together with L.V. Mirzoyan) |
| 1976 | Member of the Editorial Board of the "Reports of the USSR Academy of Sciences" |
| 1977-1996 | Chairman of the Specialized Council for Theses Defense at BAO |
| 1977 | Participation in the IAU Symp. #79: "The Large Scale Structure of the Universe" (Tallinn, Estonia, USSR, 12-16 Sep); talk: "On the Large Scale Distribution of Galaxies" |
| 1978 | Participation in the 4th Joint Colloquium of the Byurakan and Abastumani (Georgia) astrophysical observatories (Abastumani, May); talk |
| 1978 | Honorary member of the Georgian SSR Academy of Sciences |
| 1978 | Participation in the Joint colloquium of the USSR Acad. Sci. Astronomical Council and the Byurakan Astrophysical Observatory on the Non-Stable Stellar Objects (Crimea); talk |
| 1978 | Ambartsumian's 70th anniversary: An All-Union Conference of Young Astrophysicists (Byurakan, 2-5 Oct); Meeting of the Coordination Council of the presidents of academies (Yerevan; A.P. Aleksandrov, N.G. Basov, et al.); publication of the collected review papers book "Modern Problems of Science about the Universe" (comp. and ed. L.V. Mirzoyan); publication of the book "Viktor Ambartsumian" (biography by L.V. Mirzoyan, in Armenian) |
| 1978 | Participation in the International Philosophical Symposium in Dusseldorf |
| 1978 | Foreign member of the Academy of Sciences of Czechoslovakia |
| 1978 | Corresponding member of the International Academy of Astronautics |
| 1978 | Foreign member (Associe etranger) of the Academy of Sciences of France |
| 1978 | Title of the Hero of Socialist Labour with investiture of Lenin Order and second Gold medal "Hammer and Sickle" for outstanding services in the development of the Soviet science and on the occasion of his 70th anniversary |
| 1979 | Visit to GDR (Berlin, Potsdam, Jena) for participation in the session of the Acad. Sci., devoted to the 100th anniversary of Albert Einstein; talk: "The Role of Einstein Coefficients of Probability of Transition in Astrophysics" |
| 1979 | On the invitation of the French Acad. Sci. visited France for receiving the diploma of the member of the French Acad. Sci. |
| 1979 | Honorary member of the Academy of Sciences of Hungary |
| 1979 | Participation in the symposium on Theoretical and Mathematical Physics (Dubna) devoted to the 70th anniversary of acad. N.N. Bogolyubov; talk "Inverse Problems of Astrophysics" |
| 1979 | Symposium of the Multilateral Research Cooperation of the Academies of Sciences of the Socialist Countries on the Problem of "Stellar Physics and Evolution": "Flare Stars, Fuors and Herbig-Haro Objects" (Byurakan, 22-24 May); talk "On the Possible Correlation between the Luminosity and the Frequency of Flares among the Members of a Stellar Aggregate" |
| 1980 | Participation in the symposium devoted to the 2000th anniversary of Aristarch from Samos (Samos island, Greece); talk "Using the Chronology of Discoveries for Purposes of Stellar Statistics" |
| 1980 | Participation in the IAU Symp. #93: "Fundamental Problems in the Theory of Stellar Evolution" (Kyoto, Japan, 22-25 July); talk "An Observational Approach to the Early Stages of Stellar Evolution" (together with L.V. Mirzoyan) |
| 1980 | Participation in the meeting dedicated to 1500th anniversary of Davit the Invincible (Moscow) |
| 1980 | Member of the Editorial Board of the international journal “Vistas in Astronomy” (“Astronomy Prospects”, UK) |
| 1980 | IV Soviet-Finnish Astronomical Meeting (Conference on Various Problems of Galactic and Extragalactic Astronomy) (Byurakan, 9-14 June); talk "On Origin of the Diffuse Nebulae" |
| 1981- | Member of the Editorial Board of the journal "Nauka v SSSR" ("Science in the USSR") |
| 1981 | All-Union symposium devoted to the 40th Anniversary of the Introduction of the Principle of Invariance by V.A. Ambartsumian to the Radiation Transfer Theory: "Principle of Invariance and its Applications" (Byurakan, 26-30 Oct); Introductory talk "On Applications of the Principle of Invariance" |
| 1981 | Participation in the III All-Union conference on Philosophical Problems of Modern Natural Science (Moscow); talk "Dialectics of Knowledge of the Evolutionary Processes in the Universe" (together with V.V. Kazyutinski) |
| 1981 | Participation in the conference devoted to the 100th anniversary of the Astronomical Observatory of the LSU |
| 1982 | Participation in the 6th Joint Colloquium of the Byurakan and Abastumani (Georgia) astrophysical observatories (Tbilisi, May); talk; meeting with young scientists of Georgia in Tbilisi |
| 1982 | Head of the Soviet delegation at the IAU GA XVIII (Patras, Greece, 17-26 Aug); talk at the guest session of the Working Group "Flare Stars" of the IAU Commission "Variable Stars" in the Stefanian Observatory on the "Byurakan Studies of Flare Stars in Young Stellar Systems" |
| 1982 | Honorary citizen of Tbilisi (Georgia) |
| 1982 | Participation in the Annual Meeting of the USSR Acad. Sci. (Moscow); talk "On the Origin of the Diffuse Nebulae" |
| 1983 | On the invitation of the National Observatory (Tonanzintla) visited Mexico (Tonanzintla and Mexico City, 24-26 Feb) for participation in the symposium "Herbig-Haro Objects, T Tauri Stars and Related Phenomena" to honour Guillermo Haro; Concluding remarks |
| 1983 | Foreign member of the Academy of Sciences of Athens (Greece) |
| 1983 | On the invitation of the Austrian Acad. Sci. visited Austria (Vienna, Graz); lecture at the Graz University: "Evolutionary Processes in the Universe" |
| 1983 | Ambartsumian's 75th anniversary: Joint Colloquium of the Leningrad State University Chair of Astrophysics, USSR Astronomical Council, and the Byurakan Astrophysical Observatory (Byurakan, 14-16 Oct); publication of the book "Viktor Ambartsumian" by L.V. Mirzoyan (in Russian) |
| 1983 | October Revolution Order for scientific services and on the occasion of his 75th anniversary |
| 1983 | Visit to France (Paris and Cagor) in frame of the delegation of the USSR Supreme Soviet |
| 1983 | Participation in the 3rd Latin-American Regional IAU Meeting (LARIM) (Buenos-Aires, Argentina, 28 Nov - 3 Dec); talk "Understanding on Problems of the Origin of Stars developed in the Byurakan Observatory" (presented by E.S. Parsamian) |
| 1984 | Gold medal of the Academy of Sciences of Czechoslovakia for scientific services |
| 1984 | Foreign member of the Syrian Scientific Society (Academy of sciences) |
| 1984 | Participation in the jubilee conference dedicated to the 50th anniversary of the LSU Chair of Astrophysics (Leningrad); talk |
| 1984 | International Symposium: "Flare Stars and Related Objects" (Byurakan, 16-19 Oct) |
| 1984 | Participation in the 8th Joint Colloquium of the Byurakan and Abastumani (Georgia) astrophysical observatories (Abastumani, Nov); talk |
| 1985 | Honorary member of the Society of History of Science of Syria |
| 1985 | Honorary citizen of Yerevan |
| 1986 | IAU Symp. #121: "Observational Evidence of Activity in Galaxies" (Byurakan, 3-7 June); Chairman of SOC |
| 1987 | Publication of the book "Envoy of the Stars" about Ambartsumian (A. Arzumanyan, Moscow, Progress Publishers) |
| 1987 | International School for Young Astronomers, organized jointly by ESO and the Byurakan Observatory: "Observations with Large Telescopes" (Byurakan, 22-28 Sep) |
| 1987 | Councilor of the Armenian Philosophical Academy |
| 1988-1990 | Chairman of the Editorial Board of the "Armenian Brief Encyclopedia" |
| 1988-1995 | Chairman of the Scientific-Publishing Council of the "Armenian Brief Encyclopedia" |
| 1988 | Participation in activities of Karabakh movement |
| 1988 | Participation in the session of the USSR Supreme Soviet on discussion of the Karabakh problem (Moscow) |
| 1988-1996 | Honorary Director of the Byurakan Astrophysical Observatory (BAO) of the Armenian National Acad. Sci. |
| 1988 | Ambartsumian's 80th anniversary: All-Union Conference of Young Astrophysicists "Observational Evidences of Instability Phenomena and their Interpretation" (Byurakan, 27-30 Sep); publication of the 3rd volume of V.A. Ambartsumian's collection of papers (comp. E.S. Parsamian, ed. V.V. Sobolev) |
| 1988 | Order of "Honour" |
| 1988 | State Prize of the Armenian SSR |
| 1988 | Visit of acad. G.I. Marchuk (President of the USSR Acad. Sci.) to Armenia |
| 1989-1991 | National Deputy of the USSR and member of the USSR Supreme Soviet |
| 1989 | IAU Symp. #137: "Flare Stars in Star Clusters, Associations and the Solar Vicinity" (Byurakan, 23-27 Oct); Chairman of SOC |
| 1990 | Honorary President of the Armenian Philosophical Society |
| 1990 | Hunger strike in Moscow (together with several other people) as a protest for solution of the Karabakh problem |
| 1992 | Full member of the European Academy (London) |
| 1992 | Full member of the Academy of Creation (Russia) |
| 1993-1996 | Honorary President of the Armenian National Academy of Sciences |
| 1994-1996 | Councilor of the Russian Academy of Sciences |
| 1994 | Motherland Order and title of "National Hero of Armenia" for creation of scientific values of international significance, exceptional services in the field of organization of science |
| 1994 | George Gamow prize and medal of the Russian Academy of Creation for outstanding contribution in the development of astrophysics |
| 1994 | Annual national prize of the All-Armenian Foundation "Hayastan" in the field of science and culture |
| 1994 | Honorary member of the Armenian Philosophical Academy |
| 1995 | State prize of the Russian Federation in the field of science and engineering for the scientific work "Dynamics of the Structure of Stellar Systems" |
| 1996 | Member of the Euro-Asian Astronomical Society (EAAS) |
| 1996 | Ambartsumian passed away on August 12 in Byurakan |
| 1998 | Ambartsumian's 90th anniversary: IAU Symp. #194: "Activity in Galaxies and Related Phenomena" (Byurakan, 17-21 Aug); the Byurakan Astrophysical Observatory was named after Ambartsumian; opening of V.A. Ambartsumian's house-museum in Byurakan; a street and a secondary school in Yerevan named after Ambartsumian; publication of the book "A Life in Astrophysics" (ed. R.V. Ambartsumian, in English); release of video-film "Viktor Ambartsumian" (in English) |
| 2001 | Publication of Ambartsumian's memories book "Episodes of Life" in Russian |
| 2003 | Publication of Ambartsumian's memories book "Episodes of Life" in Armenian |
| 2008 | Ambartsumian's 100th anniversary: International Conference "Evolution of Cosmic Objects through their Physical Activity" (Byurakan, 15-18 Sep); Second Byurakan International Summer School for Young Astronomers "Practical Astrophysics" (Byurakan, 20-30 Sep); Ambartsumian's statue in Yerevan; publication of the book with memories about V.A. Ambartsumian (ed. E.S. Parsamian); V.A. Ambartsumian's DVD and webpage; memorial coin |
| 2009 | Establishment of Viktor Ambartsumian International Science Prize |
