Counter-Earth
E561755
Counter-Earth is a hypothetical celestial body proposed in ancient Greek astronomy, imagined as a planet always hidden behind the Sun and used to explain observed cosmic order and numerical harmony.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Planet X | 2 |
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
concept in ancient Greek astronomy
ⓘ
hypothetical celestial body ⓘ hypothetical planet ⓘ |
| associatedWithPhilosophicalSchool | Pythagoreanism NERFINISHED ⓘ |
| considered | obsolete astronomical hypothesis ⓘ |
| describedAs | planet always hidden behind the Sun ⓘ |
| fieldOfDiscourse |
classical studies
ⓘ
history of astronomy ⓘ philosophy of science ⓘ |
| hasAlternativeName | Antichthon NERFINISHED ⓘ |
| hasConceptOriginPeriod | 5th century BCE ⓘ |
| hasCulturalRole | motif in science fiction ⓘ |
| hasModernInterpretation |
example of pre-Copernican cosmological speculation
ⓘ
illustration of numerological thinking in ancient science ⓘ |
| hasNoEmpiricalEvidence | true ⓘ |
| hasStatus | nonexistent in modern astronomy ⓘ |
| influenced | later speculative cosmological ideas ⓘ |
| isDistinctFrom |
hypothetical exoplanets
ⓘ
modern science fiction counter-Earths ⓘ |
| locatedRelativeToEarth | opposite side of the Central Fire from Earth ⓘ |
| locatedRelativeToSun | always behind the Sun from Earth’s perspective ⓘ |
| mentionedIn | ancient Greek philosophical texts ⓘ |
| orbits | Central Fire NERFINISHED ⓘ |
| partOf | Pythagorean cosmology NERFINISHED ⓘ |
| proposedBy | Philolaus NERFINISHED ⓘ |
| rejectedBy | modern astronomy ⓘ |
| relatedConcept |
Pythagorean harmony of the spheres
NERFINISHED
ⓘ
geocentric model ⓘ |
| usedToExplain |
cosmic order
ⓘ
numerical harmony ⓘ regularities in celestial motions ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Planet X