Hubble sequence
E261929
The Hubble sequence is a morphological classification scheme that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Hubble sequence canonical | 3 |
| Hubble morphological sequence | 1 |
| Hubble–Sandage classification | 1 |
| van den Bergh luminosity classification | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2389104 — 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 sequence Context triple: [Edwin Hubble, hasEponym, Hubble sequence]
-
A.
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.
-
B.
Stephan's Quintet
Stephan's Quintet is a visually striking compact group of five galaxies in the constellation Pegasus, famous for their complex gravitational interactions and dramatic appearance in astronomical imagery.
-
C.
Pillars of Creation
Pillars of Creation is a famous Hubble Space Telescope image showing towering columns of interstellar gas and dust in the Eagle Nebula where new stars are being born.
-
D.
Hertzsprung–Russell diagram
The Hertzsprung–Russell diagram is a fundamental astronomical chart that plots stars’ luminosities against their temperatures or spectral types, revealing key patterns of stellar evolution and classification.
-
E.
Cepheid
Cepheid is a molecular diagnostics company known for its rapid, automated PCR-based testing systems used in clinical and research settings.
- 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 sequence Target entity description: The Hubble sequence is a morphological classification scheme that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
-
A.
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.
-
B.
Stephan's Quintet
Stephan's Quintet is a visually striking compact group of five galaxies in the constellation Pegasus, famous for their complex gravitational interactions and dramatic appearance in astronomical imagery.
-
C.
Pillars of Creation
Pillars of Creation is a famous Hubble Space Telescope image showing towering columns of interstellar gas and dust in the Eagle Nebula where new stars are being born.
-
D.
Hertzsprung–Russell diagram
The Hertzsprung–Russell diagram is a fundamental astronomical chart that plots stars’ luminosities against their temperatures or spectral types, revealing key patterns of stellar evolution and classification.
-
E.
Cepheid
Cepheid is a molecular diagnostics company known for its rapid, automated PCR-based testing systems used in clinical and research settings.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical classification system
ⓘ
galaxy morphological classification scheme ⓘ |
| appliesTo | galaxy ⓘ |
| assumes | continuous transition between galaxy types ⓘ |
| basisOf | de Vaucouleurs system ⓘ |
| classifiesBy |
morphology
ⓘ
visual appearance ⓘ |
| correlatesWith |
bulge-to-disk ratio
ⓘ
gas content of galaxies ⓘ star formation activity ⓘ |
| currentlyViewedAs | morphological sequence ⓘ |
| describedInWork |
A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae
ⓘ
surface form:
“Extra-galactic Nebulae”
“The Realm of the Nebulae” ⓘ |
| developedBy | Edwin Hubble ⓘ |
| doesNotClassifyBy |
galaxy color
ⓘ
galaxy luminosity ⓘ galaxy mass ⓘ star formation rate ⓘ |
| extendedBy |
Yerkes galaxy classification
ⓘ
Hubble sequence of galaxy classification ⓘ
surface form:
de Vaucouleurs revised Hubble–Sandage system
Hubble sequence self-linksurface differs ⓘ
surface form:
van den Bergh luminosity classification
|
| field |
astronomy
ⓘ
astrophysics ⓘ extragalactic astronomy ⓘ |
| hasComponent |
Hubble sequence of galaxy classification
ⓘ
surface form:
Hubble tuning fork diagram
|
| hasLimitation |
based on optical images only
ⓘ
subjective visual classification ⓘ |
| includesClass |
barred spiral galaxy
ⓘ
elliptical galaxy ⓘ irregular galaxy ⓘ lenticular galaxy ⓘ spiral galaxy ⓘ |
| includesSubclass |
E0 elliptical galaxy
ⓘ
E7 elliptical galaxy ⓘ Irr irregular galaxy ⓘ S0 lenticular galaxy ⓘ SBa barred spiral galaxy ⓘ SBb barred spiral galaxy ⓘ SBc barred spiral galaxy ⓘ Sa spiral galaxy ⓘ Sb spiral galaxy ⓘ Sc spiral galaxy ⓘ |
| influenced | modern galaxy classification ⓘ |
| namedAfter | Edwin Hubble ⓘ |
| originallyInterpretedAs | evolutionary sequence ⓘ |
| publicationYear | 1926 ⓘ |
| refinedInPublication | 1936 ⓘ |
| usedIn |
galaxy surveys
ⓘ
observational cosmology ⓘ |
| visualizedAs | tuning fork diagram ⓘ |
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 sequence Description of subject: The Hubble sequence is a morphological classification scheme that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Hubble morphological sequence
this entity surface form:
Hubble–Sandage classification
this entity surface form:
van den Bergh luminosity classification