Johannes Franz Hartmann (11 January 1865 – 13 September 1936) was a German physicist and astronomer. In 1904, while studying the spectroscopy of Delta...
5 KB (293 words) - 15:35, 19 March 2023
Hartmann mask is a tool to help focusing telescopes, mainly used by amateur astronomers. It is named after the German astronomer Johannes Franz Hartmann...
2 KB (296 words) - 12:59, 14 June 2024
an array of holes in a mask that had been developed in 1904 by Johannes Franz Hartmann as a means of tracing individual rays of light through the optical...
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Johanne, Johannes, Johan, or Johanes Hartmann may refer to: Johannes Hartmann (1568–1631), German chemist Johannes Franz Hartmann (1865–1936), German...
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somewhat irregular. The crater was named after German astronomer Johannes Franz Hartmann in 1970. Prior to that, this crater was designated Crater 217....
5 KB (413 words) - 21:18, 26 April 2023
Johannes Hartmann (1568–1631), German chemist Johannes Franz Hartmann (1865–1936), German astronomer active in Argentina and namesake of the Hartmann...
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1029 La Plata (category Discoveries by Johannes Franz Hartmann)
diameter. It was discovered on 28 April 1924, by German astronomer Johannes Hartmann at the La Plata Astronomical Observatory in Argentina. It was named...
15 KB (1,037 words) - 21:29, 14 January 2024
Observatory) DMP · 964 965 Angelica 1921 KT Angelica Hartmann, wife of the discoverer, Johannes Franz Hartmann (1865–1936) DMP · 965 966 Muschi 1921 KU German:...
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1904 when Johannes Franz Hartmann using photographic plates taken at Potsdam Observatory showed that the orbital period was 5.7 days. Hartmann also noticed...
25 KB (2,158 words) - 10:35, 26 October 2024
Erich Alfred Hartmann (19 April 1922 – 20 September 1993) was a German fighter pilot during World War II and the most successful fighter ace in the history...
73 KB (9,422 words) - 15:44, 25 September 2024