Leonhard Euler's Letters to a German Princess

Ronald S Calinger received his doctorate in the history of science from the University of Chicago in 1971. He is professor of history emeritus at the Catholic University of America in Washington, DC. He specializes in the history of mathematics and the mathematical sciences during the Enlightenment and the early nineteenth century. He has taught year-long courses on the history of mathematics, the history of science, and imperial Austria. He received the Austrian Cross, for the Sciences and Arts, First Class, 1996. He was the Founding Chancellor of the Euler Society, 2003, a Dibner Library Resident Scholar, 2007 and 2010, and was invited to lecture on imperial Austria during the Mozart celebration by the Smithsonian Associates, 2006-7. He has written more than 70 research articles and reviews in such journals as Isis, Archive for History of Exact Sciences, Science, and Annals of Science. Among his eight books, he edited Vita Mathematica: Historical Research and Integration with Teaching (1996), and Classics of Mathematics (1999), and wrote A Contextual History of Mathematics: to Euler (1999), and Leonhard Euler: Mathematical Genius in the Enlightenment (2016). Elena N Polyakhova graduated from the Mathematics and Mechanics Department Astronomy Division) of the Leningrad University in 1957 and has been teaching Celestial Mechanics at the St. Petersburg State University Astronomy Department since then. The scope of Polyakhova's research interests include celestial mechanics, astrodynamics (space flight dynamics and solar sailing theory), history of natural sciences (physics, mechanics, astronomy, astrodynamics), biographies and scientific legacies of scientists (Leonhard Euler, Sofya Kovalevskaya, Michael Ostrogradsky, Alexander Lyapunov), and of classical and celestial mechanics scholars of St. Petersburg. Polyakhova has published more than 200 research articles, several books, and reference materials on celestial mechanics and history of sciences. In 2012 The Princess Ekaterina Romanovna Dashkova's Society (founded by the Dashkova's Moscow Humanitarian Institute) awarded Elena Polyakhova with the gold medal For Freedom and Enlightenment. Elena Polyakhova is honored by the name of a minor planet (asteroid): the numbered minor planet (NMP) 4619 Polyakhova is named after her.