Hendrik C. van de Hulst
E475898
Hendrik C. van de Hulst was a Dutch astronomer and physicist best known for predicting the 21-cm hydrogen line, which became a cornerstone of radio astronomy.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Hendrik C. van de Hulst canonical | 1 |
| Hendrik Christoffel van de Hulst | 1 |
| van de Hulst | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4814357 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Hendrik C. van de Hulst Context triple: [Jan Oort, notableStudent, Hendrik C. van de Hulst]
-
A.
Jan Oort
Jan Oort was a Dutch astronomer renowned for his pioneering work on the structure and dynamics of the Milky Way and for proposing the existence of the distant cometary reservoir now known as the Oort cloud.
-
B.
Jacobus Cornelius Kapteyn
Jacobus Cornelius Kapteyn was a Dutch astronomer renowned for his pioneering work on the structure of the Milky Way and stellar statistics in the early 20th century.
-
C.
Willem Bilderdijk
Willem Bilderdijk was a Dutch poet, historian, and linguist of the late 18th and early 19th centuries, known for his conservative views and significant influence on Dutch Romantic literature.
-
D.
Willem de Sitter
Willem de Sitter was a Dutch astronomer and physicist known for his pioneering work in cosmology and general relativity, particularly his influential models of the expanding universe.
-
E.
Walter Baade
Walter Baade was a German astronomer whose work on variable stars and the structure of the Milky Way led to a major revision of the cosmic distance scale and our understanding of the universe’s size and age.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Hendrik C. van de Hulst Target entity description: Hendrik C. van de Hulst was a Dutch astronomer and physicist best known for predicting the 21-cm hydrogen line, which became a cornerstone of radio astronomy.
-
A.
Jan Oort
Jan Oort was a Dutch astronomer renowned for his pioneering work on the structure and dynamics of the Milky Way and for proposing the existence of the distant cometary reservoir now known as the Oort cloud.
-
B.
Jacobus Cornelius Kapteyn
Jacobus Cornelius Kapteyn was a Dutch astronomer renowned for his pioneering work on the structure of the Milky Way and stellar statistics in the early 20th century.
-
C.
Willem Bilderdijk
Willem Bilderdijk was a Dutch poet, historian, and linguist of the late 18th and early 19th centuries, known for his conservative views and significant influence on Dutch Romantic literature.
-
D.
Willem de Sitter
Willem de Sitter was a Dutch astronomer and physicist known for his pioneering work in cosmology and general relativity, particularly his influential models of the expanding universe.
-
E.
Walter Baade
Walter Baade was a German astronomer whose work on variable stars and the structure of the Milky Way led to a major revision of the cosmic distance scale and our understanding of the universe’s size and age.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Dutch scientist
ⓘ
astronomer ⓘ human ⓘ physicist ⓘ |
| awardReceived |
Bruce Medal
ⓘ
Gold Medal of the Royal Astronomical Society ⓘ Henry Norris Russell Lectureship ⓘ |
| contributedTo | mapping of the structure of the Milky Way using 21-cm radiation ⓘ |
| countryOfCitizenship | Netherlands ⓘ |
| educatedAt | Utrecht University ⓘ |
| employer |
Leiden University
ⓘ
linked to:
University of Leiden
|
| familyName |
van de Hulst
ⓘ
linked to:
Hendrik C. van de Hulst
|
| fieldOfWork |
astronomy
ⓘ
astrophysics ⓘ physics ⓘ radio astronomy ⓘ |
| gender | male ⓘ |
| givenName | Hendrik ⓘ |
| hasAcademicDiscipline | theoretical astrophysics ⓘ |
| hasInfluenceOn |
modern radio telescopes design considerations
ⓘ
techniques for mapping neutral hydrogen in galaxies ⓘ |
| hasResearchInterest |
cosmic dust
ⓘ
interstellar dust ⓘ interstellar hydrogen ⓘ radiative transfer in astrophysics ⓘ scattering of light ⓘ |
| inField |
galactic structure
ⓘ
observational cosmology ⓘ spectral line astronomy ⓘ |
| influenced | development of galactic radio astronomy ⓘ |
| knownFor |
contributions to radio astronomy
ⓘ
prediction of the 21-cm hydrogen line ⓘ work in interstellar medium physics ⓘ |
| languageOfWorkOrName |
Dutch
ⓘ
English ⓘ |
| memberOf | Royal Netherlands Academy of Arts and Sciences ⓘ |
| name |
Hendrik Christoffel van de Hulst
ⓘ
linked to:
Hendrik C. van de Hulst
|
| nationality | Dutch ⓘ |
| notableAchievement | predicted the hyperfine transition of neutral hydrogen at 21 centimeters ⓘ |
| notableConcept | van de Hulst multiple scattering theory ⓘ |
| notableWork |
studies of interstellar extinction
ⓘ
theoretical work on the 21-cm line of neutral hydrogen ⓘ work on multiple scattering of light ⓘ |
| occupation | university professor ⓘ |
| workLocation |
Leiden, Netherlands
ⓘ
linked to:
Leiden, South Holland, Netherlands
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Hendrik C. van de Hulst Description of subject: Hendrik C. van de Hulst was a Dutch astronomer and physicist best known for predicting the 21-cm hydrogen line, which became a cornerstone of radio astronomy.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Hendrik C. van de Hulst
linked to: Hendrik C. van de Hulst