PERSONEN FILTERS: pagina=1, s=, membership=International Astronomical Union, berichten=

Gevonden personen:

Willem de Sitter

MALE
Sneek, Netherlands 06-05-1872 - Leiden, Netherlands 20-11-1934

Member Group(s)

  • KNAW-Lid

Variant Names

N/A

BIO

Dissertation: N/A

Highest degree: N/A

Fields of interest:
Biography:
After grammar school in Arnhem, Willem de Sitter went to Groningen to study mathematics However he did some experimental work for his physics curricula at the astronomical laboratory of the famous astronomer Jacobus C. Kapteyn. The latter was involved in measuring photographic plates from the Cape Observatory in South Africa, in collaboration with Sir David Gill to chart the southern skies. During a visit to Groningen Gill invited de Sitter to Cape Town, de Sitter accepted the invitation and decided to become an astronomer. He left in August of 1897 and among others worked on measurements of the four Galilean satellites of the planet Jupiter.
Towards the end of 1899 de Sitter returned to Groningen and obtained his Ph.D. degree there in 1901. The title was Discussion of Heliometer Observations of Jupiter's Satellites. In South Africa he also had met his wife Elanora Suermondt. The thesis, and in particular later work resulted in better orbits for these satellites, where also the mutual gravitational influences on each other s orbits were corrected on. This entailed new mathematical tools and approaches.
In 1908 de Sitter was appointed in Leiden as professor in theoretic astronomy and in 1918 he was appointed as director. Together with Kapteyn he reorganised the Observatory, where previously the work concentrated on fundamental observations of positions and motions of stars on the sky, the new observatory also concentrated from then on on astrophysics and theory. In spite of administrative duties, de Sitter still found time for studies on various aspects of astronomy and astrophysics. In particular his work on the General Theory of Relativity that Einstein had formulated, is universally known. He showed that the field equations that Einstein had formulated then very recently before also allowed a solution for the structure and evolution of the universe where it was expanding, contracting or oscillating. The first is now known to be the case. The most simple solution of the field equations for the expanding universe is called the Einstein-de Sitter Universe.
In 1919 de Sitter was operated for gallstones. However, the overdose of ether he was given resulted in a continuing poor health. Among others he suffered from tuberculosis, which made it necessary to spend two years in Arosa in Switzerland. He still succeeded in doing research and he arranged an agreement with the Union Observatory in Johannesburg, to jointly carry out observational studies. Also he took measures for two expeditions to Kenya to improve absolute positional measurements of stars on the sky. He received various important honors, among which the Gold Medal of the Royal Astronomical Society (1931) and the Bruce Medal of the Astronomical Society of the Pacific (1931). He was president of the International Astronomical Union from 1925 to 1928.

Residence

  • Leiden 

Occupation

N/A

Education

N/A

Membership

Provenance

  • Sitter, W. de, Proceedings 37, 1934, p. 734-737 door J. van der Hoeve.

Publications

Wiki and VIAF

Wiki Data: Q313059
VIAF: http://viaf.org/viaf/190428276

Gerardus Wouter Verwey Mejan

MALE
Den Haag, Netherlands 26-09-1797 - Aarlanderveen, Netherlands 06-08-1850

Member Group(s)

  • Genootschaps-lid

placeholder

Variant Names

  • Verweij Mejan, Gerardus Wouter

BIO

Dissertation: N/A

Highest degree: mr.

Fields of interest:
Biography:
N/A

Residence

N/A

Occupation

  • member 1835 - 1850 - Tweede Kamer der Staten-Generaal
  • lawyer 
  • banker 

Education

  • law student  - 1815, Leiden

Provenance

Publications

N/A

Wiki and VIAF

Wiki Data: N/A
VIAF: N/A

Gevonden berichten:

12-09-2022 11:03 - [Event] Conference "African Scientists in Colonial and Postcolonial Contexts, 1800-2000" (Royal Society of London, Carlton House, 21 October 2022)

22-04-2022 03:10 - Wedergeboorte van een oude kaart van de Maas bij Rotterdam (Academisch erfgoedblog, Marco van Egmond)

28-03-2022 11:54 - [Call for Papers] Does Science need Heroes? (Nobel) Prize cultures in the Netherlands (Leiden, 29-30 September 2023; Deadline 15 July 2022)

26-03-2022 04:29 - [Job] Postdoc, “Early Citizen Science: How the Public Used Linnaean Instructions to Collect the World” (Deadline: 2 May 2022)

14-06-2021 01:43 - A New Timeline from Archives of IT

16-02-2021 03:08 - Call for Applications: Lisa Jardine History of Science Grant (Deadline: 17 March 2021)

07-01-2021 05:21 - PhD position in Soviet History (m/f/d; E13 TV-L, 65%), on Environment and Health in the Soviet Union and its Successor States, 1945–2000 (Universität Tübingen; Deadline 17 January 2021)

11-09-2020 12:20 - Dijksterhuislezing 2020: Abraham Kuyper & Multatuli (Online, 13 November 2020)

22-06-2020 11:46 - [Publicatie] De Universitaire campus. Ruimtelijke transformaties van de Nederlandse universiteiten sedert 1945

10-03-2020 11:50 - Jobs: Postdoc/PhD Candidate, "Managing Scarcity" (Maastricht University; various deadlines)

04-09-2019 10:07 - Call for Papers: "Animals as Objects. Zoological Gardens and Natural History Museum in Berlin, 1810−2020" (Berlin, 13-14 February 2020; Deadline: 20 September 2019)

26-04-2019 01:48 - REMINDER Registration for the Gewina Woudschoten conference closes Tuesday, April 30th

26-04-2019 01:00 - Report: History of Science and Humanities PhD Conference 2019 (Kerkrade)

15-03-2019 01:55 - Conference: Teaching the history of Knowledge: Purposes, Problems, Practices (Vrije Universiteit Amsterdam, 20 March 2019)

12-03-2019 01:47 - CfA: 5th International Conference on the History and Philosophy of Computing (Bergamo, Italy, 28-30 October 2019; Deadline 30 April 2019)

21-02-2019 12:54 - Jobs: PhD position & Assistant Professorship (Maastricht; Deadlines 15 March (PhD) & 28 February (! AP))

14-01-2019 12:06 - Call for Papers: Dutch Historians' Days 2019: Inclusive History (Groningen, 22-24 August 2019; Deadline 28 January 2019)

28-12-2018 10:00 - Job: Fully funded PhD position "Atmospheric Tides Science", Ghent University & Università Ca' Foscari, Venice (Deadline: 28 February 2019)

06-12-2018 02:32 - [REMINDER] Call for Papers: History of Science Society annual meeting (Utrecht, 23-27 July 2019; Deadline 7 January 2019)

16-10-2018 03:20 - Announcement: 12th International Conference on the History of Chemistry (ICHC12; Maastricht, the Netherlands, 29 July - 2 August, 2019)

Gevonden publicaties:

Conflicten

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 34, nummer 1 (1971), 1-27

Authors

Tammes, A.J.P.

Keywords

N/A

Download als pdf file (28 pagina's, 10.54 M)

Over de doeltreffendheid van monetaire politiek: Nederlandse ervaringen 1954-1969

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 34, nummer 4 (1971), 153-184

Authors

Holtrop, M.W.

Keywords

N/A

Download als pdf file (39 pagina's, 17.41 M)

De meervoudige gedetermineerdheid van menselijk gedrag

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 35, nummer 3 (1972), 129-144

Authors

Duijker, H.C.J.

Keywords

N/A

Download als pdf file (18 pagina's, 8.15 M)

DE LEEFRUIMTE VAN DE MENS

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 36, nummer 3 (1973), 75-96

Authors

Tammes, A.J.P.

Keywords

N/A

Download als pdf file (24 pagina's, 8.83 M)

Maerlants Torec als 'Sleutelroman'

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 36, nummer 5 (1973), 119-195

Authors

Heeroma, K.

Keywords

N/A

Download als pdf file (80 pagina's, 28.28 M)

Vom Mesopotamischen Menschen der Altbabylonischen Zeit und seiner Welt

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 36, nummer 6 ( 1973), 199-345

Authors

Kraus, F.R.

Keywords

N/A

Download als pdf file (150 pagina's, 56.85 M)

Hendrik IV en het Protest

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 36, nummer 10 (1973), 423-440

Authors

Bachrach, A.G.H.

Keywords

N/A

Download als pdf file (20 pagina's, 7.05 M)

Gestaafde en vermeende affiniteiten van het Baskisch

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 9, nummer 2 (1946), 13-24

Authors

Uhlenbeck, C.C.

Keywords

N/A

Download als pdf file (16 pagina's, 5.05 M)

DE „COLLEGES" VAN DE OUDERE ENGELSE UNIVERSITEITEN IN DE SPIEGEL VAN DE ENGELSE ROMAN

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 24, nummer 6 (1961), 207-220

Authors

Stockum, T.C. van

Keywords

N/A

Download als pdf file (17 pagina's, 6.22 M)

CLEANTHES OR POSIDONIUS? THE BASIS OF STOIC PHYSICS

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 24, nummer 9 (1961), 265-289

Authors

Solmsen, Friedrich

Keywords

N/A

Download als pdf file (28 pagina's, 11.16 M)

Le Targum De Job De La Grotte 11 De Qumran (11QtgJob). Première Communication

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 25, nummer 9 (1962), 545-557

Authors

Ploeg, J. van der

Keywords

N/A

Download als pdf file (18 pagina's, 6 M)

HET WIJSGERIG ONDERWIJS AAN DE ILLUSTRE SCHOOL TE BREDA (1646-1669)

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 25, nummer 7 (1962), 421-522

Authors

Sassen, F.

Keywords

N/A

Download als pdf file (106 pagina's, 39.74 M)

Étude sur les formes métriques du mystère du vieil testament

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 25, nummer 2 (1962), 37-161

Authors

Noomen, W.

Keywords

N/A

Download als pdf file (134 pagina's, 41.55 M)

De vindplaatsen van de "Romeinse bronnen"

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 25, nummer 15 (1962), 715-726

Authors

Polman, P.

Keywords

N/A

Download als pdf file (14 pagina's, 5.7 M)

De bouw van het Engelse woord

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 4, nummer 8 (1941), 229-306

Authors

Kruisinga, E.

Keywords

N/A

Download als pdf file (78 pagina's, 22.63 M)

Cyprianus van Carthago

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 21, nummer 9 (1958), 233-265

Authors

Bakhuizen van den Brink, J.N.

Keywords

N/A

Download als pdf file (34 pagina's, 14.79 M)

Het Griekse erfdeel in het werk van Thomas Hardy

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 43, nummer 3 (1980), 63-76

Authors

Kamerbeek, J.C.

Keywords

N/A

Download als pdf file (16 pagina's, 5.22 M)

Over het lezen en het boek

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 21, nummer 4 (1958), 75-93

Authors

Dresden, S.

Keywords

N/A

Download als pdf file (22 pagina's, 8.08 M)

Eusebeia en de cardinale deugden. Een studie over de functie van Eusebia in het leven der Grieken en haar verhouding tot de ethiek

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 23, nummer 4 (1960), 77-164

Authors

Loenen, D.

Keywords

N/A

Download als pdf file (94 pagina's, 34.52 M)

L'ÂME, LE NOUS ET LES HENADES DANS LA THÉOLOGIE DE PROCLUS

Referentie: Mededelingen Letterkunde, Nieuwe Reeks, deel 23, nummer 2 (1960), 29-42

Authors

Grondijs, L.H.

Keywords

N/A

Download als pdf file (16 pagina's, 5.83 M)

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