| Aerological Observatory, Russia (f.1912) |
| 1913-1914 Alexander Friedmann |
| Allegheny, Pittsburgh (f.1859) |
| 1891-1898 James Edward Keeler |
| 1915-1918 Robert Julius Trumpler |
| 1920-1930 Heber Doust Curtis |
| Armagh, Northern Ireland (f.1789) |
| 1947-1981 Ernst Julius Opik |
| Astrophysical, Potsdam, Germ. (f.1871) |
| 1874-1907 Hermann Carl Vogel |
| Berlin, Germany (f.1700) |
| 1835-1851 Johann Gottfried Galle |
| Bogenhausen, Germany (f.1815) |
| 1835 Johann Lamont |
| Bothkamp, Germany (f.1869) |
| 1870-1874 Hermann Carl Vogel |
| Cairo, Egypt (f.1120) |
| 1120 al- Amir bi Ahkam Allah |
| Cape Observatory, South Africa (f.1820) |
| 1897-1899 Willem de Sitter |
| Cincinnati, Ohio (f.1842) |
| 1868-1873 Cleveland Abbe |
| Finnish (f.1819), Turku®Helsinki |
| 1823-1637 F.W.A Argelander |
| George Bishop’s, London (f.1936) |
| 1851 Norman Robert Pogson |
| Gottingen, Germany (f.1816) |
| 1901-1909 Karl Schwarzschild |
| Hamburg, Bergedorf (f.1909) |
| 1919-31 Wilhelm Heinrich Walter Baade |
| Hartwell Observatory, England (f.1831) |
| 1859 Norman Robert Pogson |
| Harvard College (f.1839), Massachusetts |
| 1877-1919 Edward Charles Pickering |
| 1893 Henrietta Swan Leavitt |
| 1921-1952 Harlow Shapley |
| 1924-1925 Georges Edouard Lemaitre |
| 1930-1934 Ernst Julius Opik |
| 1958-1960 Gerard Henri de Vaucouleurs |
| Heidelberg-Konigstuhl, Germany (f.1898) |
| 1898 Maximilian Wolf |
| Herrevad Abbey, Sweden (f.1571) |
| 1571 Tycho Brahe |
| Istanbul, European Turkey, (f.1575) |
| 1575 Taqi al- Din |
| Jodrell Bank, England (f.1951) |
| 1951-80 Bernard Lovell |
| Konigsberg, Russia (f.1810) |
| 1810-1846 Friedrich Wilhelm Bessel |
| 1820 Argelander |
| Leiden, Netherlands (f.1633) |
| 1875-1877 Jacobus Cornelius Kapteyn |
| 1919-1934 Willem de Sitter |
| Lick, California (f.1888) |
| 1887-1895 Edward Emerson Barnard |
| 1888-1891 James Edward Keeler |
| 1898-1900 James Edward Keeler |
| 1902-1820 Heber Doust Curtis |
| 1918-1938 Robert Julius Trumpler |
| 1921-1922 Knut Emil Lundmark |
| Lilienthal. Lower Saxony (f.1782) |
| 1806-1810 Friedrich Wilhelm Bessel |
| Lowell, Arizona (f.1894) |
| 1894 Percival Lowell |
| 1901-1909 Vesto Melvin Slipher |
| 1929-1843 Clyde William Tombaugh |
| 1957-1958 Gerard Henri de Vaucouleurs |
| Lund, Sweden (f.1741) |
| 1929-1955 Knut Emil Lundmark |
| Madras, Madras, SE India (f.1786) |
| 1861-1891 Norman Robert Pogson |
| Main Geophysical, Leningrad (f.1849) |
| 1920-1925 Alexander Friedmann |
| Maragha, Iran (f.1259) |
| 1259 al-Tusi, |
| Meudon, France (f.1876) |
| 1875 Pierre Jules Cesar Janssen |
| Mount Stromlo, Australia (f.1924) |
| 1951-57 Gerard Henri de Vaucouleurs |
| Mount Wilson, California (f.1904) |
| 1912-1946 Adriaan Van Maanen |
| 1914-1921 Harlow Shapley |
| 1919-1953 Edwin Powell Hubble |
| 1919-1954 Milton La Salle Humason |
| 1921-1923 Knut Emil Lundmark |
| 1931-58 Wilhelm Heinrich Walter Baade |
| 1937-1968 Fritz Zwicky |
| 1952-97 Allan Rex Sandage |
| Naples, Italy (f.1819) |
| 1817 Giuseppe Piazzi |
| Palermo, Sicily (f.1790) |
| 1791 Giuseppe Piazzi |
| Palomar, California (f.1928) |
| 1937-1968 Fritz Zwicky |
| 1952-1997 Allan Rex Sandage |
| Panzano, Italy (f.1638) |
| 1648-1650 Geovanni Domenico Cassini |
| Paris, France (f. 1667) |
| 1671-1712 Geovanni Domenico Cassini |
| 1672-1681 Ole Christensen Romer |
| 1854-1870 Urbain Jean Joseph Leverrier |
| 1873-1877 Urbain Jean Joseph Leverrier |
| Potsdam Astrophysical, Germany (f.1871) |
| 1909-1914 Karl Schwarzschild |
| Pulkovo, St Petersburg, (f.1838) |
| 1839 Wilhelm von Struve |
| 1865-1866 Cleveland Abbe |
| Radcliffe, Oxford (f.1773) |
| 1853 Norman Robert Pogson |
| Royal, Cape of Good Hope (f.1820) |
| 1831-1833 Thomas Henderson |
| Royal Greenwich, England (f.1675) |
| 1675-1719 John Flamsteed |
| 1952-1956 Thomas Gold |
| Samarkand, Uzbekistan (f.1420) |
| 1420 Ulugh Beg |
| Stjerneborg, Sweden (f.1576) |
| 1576 Tycho Brahe |
| Stockholm, Sweden (f.1752) |
| 1842 Anders Jonas Angstrom |
| 1927 Bertil Lindblad |
| Tartu Estonia (f.1810) |
| 1813-1839 Wilhelm von Struve |
| Ujjain, India (12th century) |
| 1185 Bhaskara |
| Uppsala, Sweden (f.1741) |
| 1843 Anders Jonas Angstrom |
| 1920-1929 Knut Emil Lundmark |
| Uraniborg, Sweden (f.1584) |
| 1584 Tycho Brahe |
| Yale, Connecticut (f.1830) |
| 1924 Jan Hendrik Oort |
| Yerkes, Wisconsin (f.1897) |
| 1895-1923 Edward Emerson Barnard |
| 1911-1912 Adriaan Van Maanen |
| 1914-1917 Edwin Powell Hubble |
| 1946-1948 Hendrik van de Hulst |
Astronomy, Basics, Observatories
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