Jan Jędrzejewicz ‒ a professional among amateur astronomers

Magda Siuda-Bochenek


Jan Jędrzejewicz was an eminent Polish amateur astronomer. He lived and worked as a doctor in a small town of Płońsk, situated 60 km of Warsaw. His great passion was astronomy and he devoted his all free time to it. After gaining essential knowledge, he built observatory, which he professionally equipped with his own funds. The main subject of his work was micrometer measurements of double stars, to which he applied himself with unusual precision and diligence. This was appreciated by an American astronomer S.W. Burnham, who included these results in his catalogue of double stars. Jędrzejewicz also observed the Sun, comets, planets and other sky phenomena, and the results of his works were published in the international journals: “Astronomische Nachrichten” and “Vierteljahrsschrift Astronomischen Ggesellschaft”. Noteworthy in his papers are extremely thorough investigation of the subject and a great number of references to papers of contemporaneous professional astronomers. Jędrzejewicz aroused interest of the scientific world, which was demonstrated by the fact that information about him appeared several times in the journal “Nature”.

Słowa kluczowe: astronomy in Poland, nineteen-century astronomy, amateur astronomy

Magda Siuda-Bochenek, Institute for the History of Science of the Polish Academy of Science.

J. Kowalczyk, Wiadomości o obserwatorium w Płońsku i o pracach Jana Jędrzejewicza w dziedzine astronomii i meteorologii, Prace matematyczno-fizyczne, t. 1, 1888, p. 113.

H. Dobrzycki, Dr. Jan Jędrzejewicz. Lekarz, astronom i obywatel, założyciel spostrzegalni astronomicznej i stacyi meteorologicznej w Płońsku, Medycyna, t. 15, nr 52, 1887, p. 845.

J. Jędrzejewicz, Schreiben des Hern Dr. Jedrzejewicz an den Herausgeber, Astronomische Nachrichten, t. 95, nr 2279, 1879, p. 353-354.

J. Jędrzejewicz, Jahresberichte der Sternwarten fur 1883, Plonsk, Vierteljahrsschrift der Astronomischen Gesellschaft, t. 19, 1884, p. 129.

J. Kowalczyk, O działalności ś.p. dra Jana Jędrzejewicza w dziedzinie astronomii i meteorologii, Wszechświat, t. 7, nr 3, 1888, p. 39.

J. Kowalczyk, Wiadomości o obserwatorium w Płońsku..., op. cit., p. 115.

J. Jędrzejewicz, Mesures micrometriques des etoiles doubles, Astronomische Nachrichten, t. 97, nr 2324, 1880, p. 305.

J. Jędrzejewicz, Schreiben des Hern Dr. Jedrzejewicz..., op. cit., p. 355.

J. Jędrzejewicz, Jahresberichte der Sternwarten fur 1883..., op. cit., p. 129-130.

J. Jędrzejewicz, Widma małych spektroskopów, Wszechświat, t. 4, nr 28, 1885, p. 439-443.

J. Jędrzejewicz, La tache rouge de Jupiter, Astronomische Nachrichten, t. 99, nr 2366, 1881, p. 211.

J. Jędrzejewicz, La tache rouge..., op. cit., p. 212.

J. Kowalczyk, Krótki rys dziejów Obserwatorium Warszawskiego od r. 1820‒1900, Wiadomości Matematyczne, t. XI, 1907, p. 94-95.

J. Mietelski, Obserwatorium Astronomiczne Uniwersytetu Jagiellońskiego w okresie dyrekcji Franciszka Karlińskiego (1862‒1902), Zeszyty Naukowe Uniwersytetu Jagiellońskiego DCCCIII, Prace Fizyczne, z. 25, 1986, p. 24-27.

S.W. Burnham, A general Catalogue of double stars, The Carnegie Institution of Washington, Waszyngton 1906.

S.W. Burnham, A general catalogue of 1290 double stars discovered from 1871 to 1899 by S.W. Burnham. Arranged in order of right ascension with all the micrometrical measures of each pair, The University of Chicago Press, Chicago 1900.

T. Lewis, Mesures of the double stars contained in the Mensurae Micrometricae of F.G.W. Struve, Londyn 1906.

W.H. Smith, G.F. Chambers, A cycle of celestial objects observed, reduced, and discussed by admiral William Henry Smith. Revised, condensed, and greatly enlarged by George F. Chambers, The Clarendon Press, Oxford 1881.

J. Gledhill, On certain phenomena presented by Jupiter’s satellites and their shadows during transit, with a note on the red spot; and on some methods of observing the transits of bright and dark spots across the central meridian, Monthly Notices of the Royal Astronomical Society, t. 56, 1896, p. 494-500.