. Years Events to Commemorate
. Ago
- 500 Albrecht Durer creates “Melancolia I”, famous engraving featuring a bright comet (1514)
- 410 Kepler’s Nova (1604)
- 350 Early record of a comet from South Africa (1664)
- 200 Joseph Fraunhofer (1787–1826) maps lines in the solar spectrum (1814)
- 180 Thomas Maclear arrives in Cape Town to take up the directorship of the Royal Observatory (1834)
- 180 John Herchel arrives in Cape Town and establishes his observatory at Feldhausen (1834)
- 170 Thomas Henderson, former director of Royal Observatory, Cape, dies (Edinburgh; 1844 Nov 23)
- 150 James Clerk Maxwell publishes his theory of electromagnetism (1864)
- 150 Donati examines the light of a comet with a spectroscope (1864)
- 150 William Huggins (1824–1910) shows that nebulae are gaseous (1864)
- 140 Edward James Stone (HM Astronomer, Cape) observes a total solar eclipse (1874 Apr 16) in Namaqualand, making the first scientific spectroscopic observations in southern Africa
- 120 AW Roberts (1857–1938) elected as Fellow of the Royal Astronomical Society (1894)
- 100 David Gill dies (London; 1914 Jun 24)
- 100 Slipher announces large radial velocities of spiral nebula (1914)
- 90 9-inch telescope at Union Observatory named the Reunert Telescope (1924)
- 80 Baade and Zwicky publish their theory of neutron stars; postulate existence of pulsars (1934)
- 60 Leiden Observatory outpost established at Hartebeeshoek (1954)
- 60 Franklin Adams Telescope moved from Union Observatory to Hartebeeshoek (1954)
- 50 Ranger 7 records images of the Moon’s surface (1964)
- 50 Detection of microwave background radiation by Arno Penzias and Robert Wilson (1964)
- 50 Republic Observatory transferred to CSIR (1964)
- 50 MRM telescope installed at Cape Observatory (1964)
- 40 Mariner 10 photographs Mercury and Venus (1974)
- 40 Closure of Radcliffe Observatory; 74-inch moved to Sutherland (1974)
- 40 Michael Feast appointed director of SAAO (1974)
- 40 Willem Hendrik van den Bos dies (Johannesburg; 1974 Mar 30)
- 10 David S. Evans dies (Austin, Texas; 2004 Nov 14)
Visit the Events to commemorate page.