Gustaf Järnefelt
Gustaf Juhana Järnefelt (born May 6, 1901 in Helsinki ; † August 9, 1989 there ) was a Finnish astronomer.
Järnefelt studied at the University of Helsinki with the candidate degree in 1922 and the doctorate (licentiate) with Ernst Lindelöf in 1929. The subject of the dissertation was a geometric work with the title Some remarks on the connection between the geometrical axioms of connection and tactical configurations . From 1923 he was a senior assistant at the Helsinki Observatory and later an observer. From 1925 to 1933 he was in Germany. From 1937 he was a lecturer and from 1945 to 1969 professor of astronomy at the University of Helsinki.
Järnefelt dealt with general relativity and theoretical cosmology and was involved in a photographic sky survey in Finland. In 1948 he succeeded in getting the Helsinki observatory to have a Schmidt telescope at a time when its location was already being called into question by the increasing city lighting. After the launch of the Sputnik satellites in 1957, he became known in Finland as an expert in tracking them.
The asteroid (1558) Järnefelt is named after him.
Fonts
- G. Järnefelt & P. Kustaanheimo : An observation on finite geometries , The 11th Skandinaviske Matematikerkongress, Trondheim (1949), pp. 166–182.
Web links
Individual evidence
- ↑ Gustaf Järnefelt in the Mathematics Genealogy Project (English)
| personal data | |
|---|---|
| SURNAME | Järnefelt, Gustaf |
| ALTERNATIVE NAMES | Järnefelt, Gustaf Juhana |
| BRIEF DESCRIPTION | Finnish mathematician and astronomer |
| DATE OF BIRTH | May 6, 1901 |
| PLACE OF BIRTH | Helsinki |
| DATE OF DEATH | August 9, 1989 |
| Place of death | Helsinki |