Polyakhova, Elena N.: - 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.