Vishnevsky Vincent

Born in 1781, Mr.. In 1804, Mr.. Vishnevsky was elected to the Academy and worked as an associate in the beginning with Schubert at the observatory of the Academy of Sciences. Vishnevsky with incredible acuity, he observed the great comet in St. Petersburg in 1807, Mr.. in March 1808, therefore, a whole month after all astronomers in Europe have lost sight of her. But observations have Vishnevsky could spend only the winter months, the rest of the year he spent in expeditions to Russia in order to determine the geographical position of the major points of. Vishnevsky began its journey in 1806. and graduated in 1815, . being passed from Libau to Yekaterinburg (40 б° longitude) and from Mezen to Mount Elbrus in the Caucasus (22 б°, . 5 to latitude), . defining as accurately as possible and carefully position about 250 points, . , which included almost all the provincial cities,
. To determine the latitude and time Vishnevsky used Troughton'a sextant and two pocket chronometers. Longitude 17 basic points Vishnevsky deduced from observations of occultation of stars by the moon and several eclipses of the Sun, longitude of the remaining points were identified Movements chronometers. In addition to the above observations of the comet in 1807, Vishnevsky watched another comet in 1811, Mr.. its railroad from July 31 to August 17, 1812. (n. st.) again when all the other astronomers could not even find it. Vishnevsky died, having reached old age. Pulkovo Observatory paid tribute to the famous astronomer, explorer, placing the portrait Vishnevsky (Chumakov painted in 1854) in one of its halls. A. J.