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Stavros Plakidis

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Stavros Plakidis
Personal details
Born(1893-05-22)May 22, 1893
Constantinople, Turkey
DiedJanuary 30, 1991(1991-01-30) (aged 97)
Athens Greece
NationalityGreek
ProfessionProfessor, Dean, Astronomer
Alma materUniversity of Athens
Known forPenteli Astronomical Station
Evgenides Planetarium
Variable Stars
Scientific career
FieldsAstronomy
Astrophysics
Mathematics
InstitutionsUniversity of Athens
National Observatory of Athens
Evgenides Planetarium
Doctoral advisorDemetrios Eginitis
Arthur Eddington
Notable studentsJean Focas

Stavros Plakidis (Greek: Σταύρος Πλακίδης; May 22, 1893 – January 1, 1991) was an astronomer, professor, astrophysicist, mathematician, author, and director of the Astronomical Institute of the National Observatory of Athens and intermittently served as chairman of the National Observatory. He is considered the father of modern astronomy in Greece. Plakidis made systematic observations of variable stars, novae, planets (Mars, Jupiter, Saturn, and Mercury), minor planets, stellar parallaxes, orbits of comets, and double stars, also contributing to the accurate geographic coordinates of the Athens Observatory. Plakidis independently discovered V1500 Cygni several hours after Minoru Honda claimed the find in Japan.[1][2][3]

Plakidis was born in Constantinople. He attended the University of Athens and became an assistant astronomer at the National Observatory under Demetrios Eginitis eventually traveling to Europe to study in Italy, France, Germany, and England. While in England he collaborated with Arthur Eddington on a paper entitled the Irregularities of the Period of Long-Period Variable Stars and by 1931 Plakidis was awarded a Ph.D.[4] He returned to Greece and became an astronomy professor at the University of Athens. He also worked at the National Observatory of Athens remaining at both institutions until 1964.[5]

Plakidis was honored by countless international institutions for his work in the field of astronomy. He helped erect the Penteli Observatory and added a solar physics section to the National Observatory of Athens while also modernizing the instrumentation. He continued his research on variable stars throughout his life publishing articles in dozens of international publications. He was a member of the Société astronomique de France, French Association of Variable Star Observers, Royal Astronomical Society, and British Astronomical Association. Plakidis also frequently attended meetings of the International Astronautical Federation. He was the first director of the Evgenides Planetarium. He died in Athens Greece at the age of 97.[6][7]

Biography

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Plakidis was born in Constantinople. He finished his early education in Constantinople in 1911 at the Great School of the Nation. He migrated to Athens and graduated from the School of Physics and Mathematics of the University of Athens in 1915. One of his professors included Demetrios Eginitis. Plakidis was appointed assistant at the National Observatory of Athens from 1915 to 1928. He also became a lab administrator at the astronomical lab of the University of Athens. Eginitis was the director of the facility. Because of his academic achievements in the field of astronomy, Plakidis received a scholarship and spent two years at different European observatories. He traveled to Italy, the German city Heidelberg and the French cities of Paris, Meudon, and Lyon. He also visited the English cities of Greenwich and Cambridge constantly participating in astronomical research. While he was at Cambridge he studied with Professor Sir Arthur Eddington. Plakidis and Eddington published a paper entitled the Irregularities of the Period of Long-Period Variable Stars which attracted international attention and by 1931 Plakidis was awarded a Ph.D. He returned to Athens and was awarded a position at the University of Athens after the death of Eginitis in 1934. Around the same period, he became the director of the Astronomical Institute of the National Observatory and frequently served as chairman of the National Observatory.[8][6][9]

While he worked at the National Observatory of Athens he developed new instruments and added a section for solar physics. One year before the Space Race began in 1954 Plakidis spent one year at the Yerkes Observatory in the United States of America. He also participated in the establishment of the Penteli Observatory containing a 63 cm Newall telescope which was donated by Cambridge University in 1955 because of Plakidis's lifelong research relationship with Sir Arthur Eddington.[10] Plakidis continued his research on variable stars throughout his life writing papers for different local and international publications. He published books on spherical astronomy, astrophysics, and practical astronomy. He was an observational astronomer.[11] Some of his observations were published in the Annals of the Academy of Athens, Annales de l'Observatoire National d'Athenes, Royal Astronomical Society, Harvard College Observatory Bulletin, Astronomische Nachrichten, Journal des Observateurs, Ciel et Terre, Comptes rendus de l'Académie des Sciences, and Bulletin de l'Observatoire de Lyon.[12][13][6][9]

He made systematic observations on variable stars, double stars, novae, solar eclipses, stellar parallaxes, and the planets Mars, Jupiter, Saturn, and Mercury. He was the first director of the Evgenides Planetarium and developed the facility. He retired in 1964 and became honorary director of the Astronomical Institute and emeritus professor at the University of Athens. He continued observational astronomy until his death. In 1974, he independently discovered V1500 Cygni several hours after Minoru Honda registered the discovery in Japan. That same year he was honored by a publication of his works entitled In honorem S. Placidis :special volume dedicated to Professor S. Plakidis on his 80th birthday. He died on January 30, 1991, at 97 years old.[14][15][6][9]

Publications

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Books and articles authored by Stavros Plakidis
Date Title Title in English
1939 Ο Γαλαξίας και η Σχέσις Αυτού Προς το Σύμπαν The Galaxy and its Relationship to the Universe
1939 Το Αστρον τής Βηθλεέμ The Star of Bethlehem
1947 Αἱ Σύγχρονοι Αστρονομικαί Έρευναι και η Συμβολή της Ελλάδος εις την Διεθνή Συνεργασίαν Modern Astronomical Research and Greece's Contribution to International Cooperation
1948 Οι Μεταβλητοί Αστέρες και ο Τρόπος Παρατηρήσεως Αυτών How to Observe Variable Stars
1948 Λαϊκή Αστρονομία Popular Astronomy
1953 Τρεις Μεγάλοι Ερευνηταί Three Great Researchers (Edward Arthur Milne, James Jeans, and Arthur Eddington
1958 Πρακτική Αστρονομία Practical Astronomy
1960 Εισαγωγή εις την Φυσικήν Αστρονομίαν Introduction to Physical Astronomy
1969 Τό Ἐθνικόν Ἀστεροσκοπεῖον Ἀθηνῶν καί τό Έργον του (1842-1965) The National Observatory of Athens and its Work (1842-1965)
1974 Η Αστρονομία και το Θρησκευτικόν Συναίσθημα Religious Views on Astronomy
1992 Η Μυθολογία, η Ονοματολογία και τα Αξιοπαρατήρητα των Αστερισμών The Mythology, Nomenclature and Observation of the Constellations
Books and articles authored by Demetrios Eginitis in English
Date Title
1929 Irregularities of Period of Long-period Variable Stars
1946 Astronomy in Greece During the War
1960 Astronomy in Modern Greece
1974 In honorem S. Placidis :Special Volume Dedicated to Professor S. Plakidis on his 80th birthday

See also

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References

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  1. ^ Contopoulos 1991, pp. 483.
  2. ^ Nicolaidis & Emanuel 2011, pp. 187.
  3. ^ Staff Writers (February 16, 2023). "Σταύρος Μ. Πλακίδης (Stavros M. Plakidis) in Greek". Online Compendium of Greek and German. Retrieved February 16, 2023.
  4. ^ Novello & Bergliaffa 2005, pp. 2040.
  5. ^ Staff Writers (February 16, 2023). "Greeks with a PhD in Astronomy". Hellenic Astronomical Society. Retrieved February 16, 2023.
  6. ^ a b c d Stefanidis 1952, pp. 67.
  7. ^ Staff Writers (February 16, 2023). "Planetarium: A Dome Full of History (Translated from Greek)". Greeks Channel. Retrieved February 16, 2023.
  8. ^ Staff Writers (February 16, 2023). "Stavros Plakidis (Σταύρος M Πλακίδης)". American Astronomical Society. Retrieved February 16, 2023.
  9. ^ a b c Contopoulos 1991, pp. 483–484.
  10. ^ Hutchins 2017, pp. 296.
  11. ^ Contopoulos 2004, pp. 4.
  12. ^ Andrikopoulos & Tzavidopoulos 2021, pp. 59.
  13. ^ Staff Writers (February 16, 2023). "National Observatory of Athens, Greece". Portal to the Heritage to Astronomy United Nations Educational, Scientific and Cultural Organization. Retrieved February 16, 2023.
  14. ^ Staff Writers (February 16, 2023). "Stavros Plakidis". Royal Astronomical Society. Retrieved February 16, 2023.
  15. ^ Staff Writers (February 16, 2023). "Πλακίδης Σταύρος Μ (Plakidis Stavros M)". National Library of Greece. Retrieved February 16, 2023.

Bibliography

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