Hans Severin Jelstrup (2 August 1893 in Christiania – 1964) was a Norwegian astronomer. His specialties were

geophysics Geophysics () is a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment, and the use of quantitative methods for their analysis. The term ''geophysics'' som ...

and

geodesy Geodesy ( ) is the Earth science of accurately measuring and understanding Earth's figure (geometric shape and size), orientation in space, and gravity. The field also incorporates studies of how these properties change over time and equivale ...

. He spent his entire academic career, from 1922 to 1963, in the

Norwegian Mapping and Cadastre Authority The Norwegian Mapping Authority (NMA) ( no, Statens kartverk or Kartverket) is Norway's national mapping agency, dealing with land surveying, geodesy, hydrographic surveying, cadastre and cartography. The current director is Johnny Welle. Its ...

(then known as Norges Geografiske Oppmåling). He also edited the official Norwegian almanac from 1943 until his death. He was taking part in forming the

Norwegian Astronomical Society Norwegian, Norwayan, or Norsk may refer to: *Something of, from, or related to Norway, a country in northwestern Europe *Norwegians, both a nation and an ethnic group native to Norway *Demographics of Norway *The Norwegian language, including the ...

, and on February 25, 1938, he was elected as the first chairman.https://www.astronomi.no/wp-content/uploads/2022/12/1938-05-05_generalforsamlingNAS.jpg

References

1893 births 1964 deaths Norwegian astronomers Norwegian almanac editors {{Norway-academic-bio-stub