Hubble–Humason galaxy redshift measurements
E550585
The Hubble–Humason galaxy redshift measurements are a landmark set of observations that extended and refined Edwin Hubble’s work on the expanding universe by systematically measuring the redshifts of distant galaxies.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Hubble–Humason galaxy redshift measurements canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5851161 — 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: Hubble–Humason galaxy redshift measurements Context triple: [Mount Wilson Observatory, siteOfDiscovery, Hubble–Humason galaxy redshift measurements]
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A.
A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
"A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae" is Edwin Hubble’s landmark 1929 paper that established the linear relationship between galaxies’ distances and their recessional velocities, providing the first strong evidence for the expanding universe.
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B.
Tolman surface brightness test
The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
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C.
Hubble sequence of galaxy classification
The Hubble sequence of galaxy classification is a morphological system that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
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D.
Tully-Fisher relation distances
Tully-Fisher relation distances are galaxy distance measurements derived from the empirical correlation between a spiral galaxy’s luminosity and its rotational velocity.
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E.
Zwicky catalog of galaxies
The Zwicky catalog of galaxies is an influential astronomical catalog compiled by Swiss astronomer Fritz Zwicky that systematically lists and classifies thousands of galaxies and galaxy clusters.
- 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: Hubble–Humason galaxy redshift measurements Target entity description: The Hubble–Humason galaxy redshift measurements are a landmark set of observations that extended and refined Edwin Hubble’s work on the expanding universe by systematically measuring the redshifts of distant galaxies.
-
A.
A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
"A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae" is Edwin Hubble’s landmark 1929 paper that established the linear relationship between galaxies’ distances and their recessional velocities, providing the first strong evidence for the expanding universe.
-
B.
Tolman surface brightness test
The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
-
C.
Hubble sequence of galaxy classification
The Hubble sequence of galaxy classification is a morphological system that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
-
D.
Tully-Fisher relation distances
Tully-Fisher relation distances are galaxy distance measurements derived from the empirical correlation between a spiral galaxy’s luminosity and its rotational velocity.
-
E.
Zwicky catalog of galaxies
The Zwicky catalog of galaxies is an influential astronomical catalog compiled by Swiss astronomer Fritz Zwicky that systematically lists and classifies thousands of galaxies and galaxy clusters.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical observation program
ⓘ
galaxy redshift survey ⓘ observational cosmology dataset ⓘ |
| appliedTo |
distant galaxies
ⓘ
extragalactic nebulae ⓘ |
| assumed |
cosmological principle at large scales
ⓘ
redshift interpreted as recessional velocity ⓘ |
| basedOn | Hubble’s law NERFINISHED ⓘ |
| contributor |
Edwin Hubble
NERFINISHED
ⓘ
Milton L. Humason NERFINISHED ⓘ |
| dataType |
galaxy radial velocity catalog
ⓘ
spectroscopic redshift data ⓘ |
| era | pre–space age astronomy ⓘ |
| extended | Hubble’s original galaxy redshift measurements ⓘ |
| field |
cosmology
ⓘ
extragalactic astronomy ⓘ observational astronomy ⓘ |
| followedBy | larger mid-20th-century redshift compilations ⓘ |
| improvedUpon | earlier, smaller galaxy redshift samples ⓘ |
| influenced |
acceptance of the Big Bang model
ⓘ
later galaxy redshift surveys ⓘ |
| language | English ⓘ |
| location | Mount Wilson Observatory NERFINISHED ⓘ |
| mainSubject |
cosmological expansion
ⓘ
distance–redshift relation ⓘ galaxy redshift ⓘ |
| measuredProperty |
radial velocity of galaxies
ⓘ
spectral line redshift of galaxies ⓘ |
| precededBy | Slipher galaxy redshift measurements NERFINISHED ⓘ |
| publicationVenue | Astrophysical Journal NERFINISHED ⓘ |
| refined | Hubble’s law NERFINISHED ⓘ |
| relatedTo |
Friedmann–Lemaître–Robertson–Walker cosmology
NERFINISHED
ⓘ
Hubble diagram NERFINISHED ⓘ cosmological redshift ⓘ |
| significance |
extended the distance–redshift relation to larger distances
ⓘ
helped establish modern observational cosmology ⓘ improved accuracy of galaxy radial velocity measurements ⓘ provided strong empirical support for cosmic expansion ⓘ |
| supportedHypothesis | universe is expanding ⓘ |
| timePeriod |
1930s
ⓘ
early 20th century ⓘ |
| usedFor |
calibration of the distance scale of the universe
ⓘ
determination of the Hubble constant ⓘ evidence for the expanding universe ⓘ testing linearity of the velocity–distance relation ⓘ |
| usedInstrument | large reflecting telescopes at Mount Wilson Observatory ⓘ |
| usedMethod | optical spectroscopy ⓘ |
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: Hubble–Humason galaxy redshift measurements Description of subject: The Hubble–Humason galaxy redshift measurements are a landmark set of observations that extended and refined Edwin Hubble’s work on the expanding universe by systematically measuring the redshifts of distant galaxies.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.