Jan Oort Kundali AstroNidan
Birth Date: April 28, 1900
Birth Time: 8:30 a.m.
Birth City: Franeker, Friesland, Netherlands
Degree : 7º34'28.29"
Sun Sign*
Degree : 3º0'10.9"
Moon Sign
Pada : 1
Degree : 23º43'17.49"
Last updated at Aug. 16, 2022, 11:55 a.m.
Created at Aug. 16, 2022, 11:55 a.m.

Kundali Details Birth details and configuration for astrological analysis

Birth Details

Gender Male
Weekday Saturday
Date April 28, 1900
Time 8:30 a.m.
Daylight Saving No
City Franeker, Friesland, Netherlands
Geo-location 53ºN11'7.66", 5ºE32'28.43"
Timezone Europe/Amsterdam

Residence Details

City Franeker, Friesland, Netherlands
Timezone Europe/Amsterdam

Ayansmha Preference

Ayanmsha True Chitra
Ayanmsha Value 22º27'21.41"


Birth Time (Europe/Amsterdam) Apr. 28, 1900, 08:27:58 AM
Birth Time (UTC) Apr. 28, 1900, 08:10:28 AM
Birth Time (LMT) Apr. 28, 1900, 08:32:38 AM
Birth Time (Julian) 2415137.840602
LMT Correction (in Hrs) 0.3694

Birth Place Location of birth place on map - Lat: 53ºN11'7.66" Lon: 5ºE32'28.43"

Life Attributes List of attributes/tags and tag associated with this kundali.


Awards | Vocational award Famous | First in Field Famous | Notable extremes Famous | Top 5% of Profession


Work | Same Job more than 10 yrs


Education | Researcher Science | Astronomy


Childhood | Order of birth

Life Story Story of person and major life events assoicated with this Kundali

Dutch astronomer, pioneer in radio astronomy, comet and galaxy exploration. Oort showed that our sun is not at the centre of Universe, but just a star in the rotating Milky Way, one rotating galaxy between many others. Jan Oort was the second child of the psychiatrist Abraham Hermanus Oort (28 March 1869, Harlingen - 12 May 1941, Leiden) and Ruth Hannah Faber (6 October 1869, Ossendrecht - 20 November 1957, Leiden), who married 14 September 1897 at Leiden and got five children. Both parents came from a family of pastors and theologians. The philologist, Orientalist and theologian Henricus Oort (27 December 1836, Eemnes - 13 December 1927, Leiden) was his grandfather. When Oort was born his father worked in the psychiatric hospital of Franeker. At age 3, on 27 May 1903 his father got a job at the Rhijngeest Psychiatric Clinic in Oegstgeest. Here the family lived in the directors house of the clinic between the woods. Oort attended the primary school in Oegstgeest and the HBS in Leiden. In 1917 he went to Groningen University, to study astronomy under the famous Jacobus Cornelius Kapteyn (19 Jan 1851, Barneveld - 18 June 1922, Amsterdam). He first doubted between physics and astronomy, but after his "Kandidaats" exam (2 July 1919) he got involved in the milky way research of Kapteyn. Kapteyn discovered in 1904 (in Leiden, as Groningen had not an astronomy observatory) the two main streams of stars that appear to be moving in opposite directions using spectroscopy and influenced both the empiricist Oort and the theorist Lindblad. Jan Oort graduated 5 November 1921 cum laude. He worked here as an assistant of Kapteyns sucessor professor P.J. van Rhijn for a year and then studied from 1922 to 1924 at the observatory of the Yale University in Connecticut. He worked the positioning of start near to the sun, and had an interests in high velocity stars that did not fit the models. When Oort came back from the US, professor Willem de Sitter, also a student of Kapteyn invited him to work as an astronomer at the Leiden Observatory. Oort became director of it from 1945 to 1970. He finished his investigations and received his doctorate 1 May 1926 (16h00) in Groningen cum laude under Van Rhijn with the thesis "The stars of high velocity". Oort was not satisfied with his thesis, as he could not give an explanation for the fast moving stars. Till then, the star world was seen as basically a resting system, but in 1926 the great Swedish astronomer Bertil Lindblad (26 Nov 1895, Örebro, 25 June 1965, Saltsjöbaden) postulated an alternative model of the milky way as a rotating disc with the sun being relatively far away from the centre ("the theory of the rotation of galaxies"). Stars near the centre would be the fast moving stars (compare with the fast moving planets Mercury and Venus near the sun). In two articles in 1927 and 1928 Jan Oort empirically confirmed Lindblad's intuitive (sic) deduction and established his reputation as an influential astronomer. Oort became conservator in 1926, lector in 1930 at Leiden University. He got invitations from Harvard and Columbia University, but refused them. Oort became professor of astronomy at the University of Leiden from 1935 to 1970. His first lecture (15 november 1935) "De bouw der sterrenstelsels" (The build of starry constellations) became his program for the rest of his live. He had many connections being the general secretary of the International Astronomical Union from 1935 to 1948 and from 1958 to 1961 being president of it. During the war, in May 1942 the very principal Oort resigned from Leiden University, as he did not want to sign the "loyaliteitsverklaring" with the German occupants. He was very angry about the dismissal by the Germans of Eduard Maurits Meijers (January 10, 1880 10 AM, Den Helder – June 25, 1954 in Leiden), the jurist of Jewish background who was the founding father of the current Dutch civil code. To prevent from being taken hostage in Camp Vught, as happened to so many opposing the Germans Dutch professors, he and his family fled to the small village Hulshorst. The Germans used the strategy of executing prominent kept in hostage Dutchmen when a German soldier was shot by the Dutch resistance. In exile, in Hulshost, he began writing a book on stellar dynamics. During the war (1944) he was stimulated by then student at Utrecht, later famous Dutch astronomer and mathematician in Leiden, Hendrik van de Hulst (19 November 1918 – 31 July 2000) to set up a radio-astronomy project to detect the 21-centimeter radio emission from interstellar hydrogen. Till then stars were observed with telescopes. Lenses and prisms were used to spectroscopically analyse the light. But stars emit much more frequencies than that of the spectrum of visible light. Karl Guthe Jansky (22 October 1905 – 14 February 1950) already had "serendipitously" discovered at Bells Lab the first astronomical radio source in 1933. A great advantage of radio astronomy is that the astronomer does not need to spent the whole night way from home in the hope of a clear sky at the observatory - not likely in the Lowlands and spoiled by light city of Leiden - for doing observations. But radio astronomers can use band tapes to record it, and analyse the data afterwards. After the war Oort led the Dutch radio astronomy group that set up radio telescopes at Kootwijk, Dwingeloo and Westerbork, using of the radar equipment that was left behind by the Germans on the coast of Holland, that were then owned by the Dutch Postal Service (PTT). Oort used the radio telescopes to record the 21-centimeter Hydrogen line to map the Milky Way, including the large-scale spiral structure, the galactic center, and gas cloud motions. In 1959 Oort postulated a vast cloud of small bodies in an orbit about one light year away from the sun ("Oort cloud") as the origin of comets. He died at age 92 on 5 November 1992 in Leiden. Nobel Prize winning astrophysicist Subrahmanyan Chandrasekhar remarked, "The great oak of Astronomy has been felled, and we are lost without its shadow." Personal He married on 24 May 1927 in Utrecht Johanna Maria Graadt van Roggen (7 January 1906, Nijmegen -1993), a poet. They got 2 sons and a daughter Marijke Oort (25 April 1931, Leiden - 19 December 2008, Haarlem ). His son Coenraad Jan (Coen) Oort (5 December 1928, Leiden - 23 November 2007, Wassenaar) became a professor in economy and top Dutch civil servant from 1971-1977: "Thesaurier-generaal" (Treasurer). He was in charge of the "Oort commission" that reformed the Dutch tax system in 1990. His son Abraham H. Oort (?, Leiden - ) studied physics and became a climatologist at the Geophysical Fluid Dynamics Laboratory of the National Oceanic and atmospheric Administration at Princeton University, New Jersey. He and Jose P. Peixoto published on 1 February 1992 the handbook "Physics of Climate". After thirty years of scientific work he became a sculptor and Shiatsu therapist. Source: "Intuitive astrology" by Elisabeth Rose Campbell, who not only describes his horoscope, but also his commentary on it. We read on http://www.atasteofhealth.org: "Abraham has a private practice in Shiatsu and CranioSacral Therapy in Hartland, VT. He practices mindfulness meditation as a student of the Vietnamese Zen Master Thich Nhat Hanh. He has further been initiated as a Oneness Blessing Facilitator at the Oneness University, Chennai, India." The astronomer Jan Oort ("oort/oord" means "locality, space, place") was a declared enemy of astrology. But his son, the climatologist Abraham was certainly not. Jan Oort liked ice skating and kept records of his skating opportunities. He was the steering man of the Groningen students’ rowing team (c. 1920). He liked art, like his wife, strolling in nature and always visited museums when being abroad. Link to Wikipedia

Life Events List of life events assoicated with this Kundali profile

S.No. Event Type Event Date Event Description

Begin Major Project

July 1, 1919

Work : Begin Major Project 2 July 1919 in Groningen (studied astronomy under Kapteyn) .



May 1, 1926

Work : Published/ Exhibited/ Released 1 May 1926 at 4:00 PM in Groningen (Doctoral thesis "The stars of high velocity") .



Nov. 15, 1935

Work : Published/ Exhibited/ Released 15 November 1935 in Leiden ("De bouw der sterrenstelsels" (The build of starry constellations)) .


End Major Project

May 1, 1942

Work : End Major Project May 1942 in Nunspeet (went in exile in Hulshorst (near Nunspeet) to prevent being hostaged by the Germans) .

S.No. Event Type Event Date Event Description


May 24, 1927

Relationship : Marriage 24 May 1927 in Utrecht (Johanna Maria Graadt van Roggen (1906-1993)) .

S.No. Event Type Event Date Event Description

Degree Completion

Nov. 1, 1912

Social : End a program of study 5 November 1912 in Groningen (astronomy study, cum laude) .


Degree Enrollment

Aug. 1, 1917

Social : Begin a program of study August 1917 in Groningen (Physics, astronomy) .


Degree Enrollment

Sept. 1, 1917

Social : Begin a program of study September 1917 in Groningen (Physics, astronomy) .


Degree Completion

Oct. 1, 1921

Social : End a program of study 5 October 1921 in Groningen (Astronomy, cum laude) .

S.No. Event Type Event Date Event Description

Birth Child

Dec. 1, 1928

Family : Change in family responsibilities 5 December 1928 in Leiden (Eldest son Coen Oort born) .

S.No. Event Type Event Date Event Description

Signficant Person Death

June 18, 1922

Death of Significant person 18 June 1922 in Amsterdam (Jacobus Cornelius Kapteyn) .


Signficant Person Death

Dec. 13, 1927

Death of Significant person 13 December 1927 in Leiden (His grandfather Henricus Oort) .


Father Death

May 12, 1941

Death of Father 12 May 1941 in Leiden .


Mother Death

Nov. 20, 1957

Death of Mother 20 November 1957 in Leiden .



Nov. 1, 1992

Death, Cause unspecified 5 November 1992 in Leiden (.) .

Related Kundali List of related Kundali with this Kundali

Rudolph Cleveringa

Business Associate/Partner Relationship With Cleveringa, Rudolph (Born 2 April 1894). Notes: Oort Supported Cleveringa’S Protest

Peter Van

Business Associate/Partner Relationship With Van De Kamp, Peter (Born 26 December 1901). Notes: In 1926 Both Were Phd Students Of Pieter Van Rhijn In Groningen.

Eduard Meijers

Business Associate/Partner Relationship With Meijers, Eduard (Born 10 January 1880). Notes: Was Shocked By Prof. Meijers Dismissal, Just Because Of Being Him Jewish. Meijers Was Still The Father Of The Dutch Civil Code (Legal Civilization).

Jan Woltjer

(Has As) Teacher Relationship With Woltjer, Jan (Astronomer) (Born 3 August 1891)

Jacobus Kapteijn

(Has As) Teacher Relationship With Kapteijn, Jacobus Cornelius (Born 19 January 1851)

Kundali Versions Different version with birth date, time and ayanmsha