To the same period may perhaps belong the theory that the comet is a separate planet; this eighth planet might serve, when the counter-earth had been discarded, to maintain the number ten in regard to the heavenly bodies.
Source: wiktionary
Counter-earth
Synonyms for "counter-earth" (1 found)
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Closest matches (1)
Noun(1 words)
Translations
1 translations across 1 languages.
Ancient Greek
1 entries- ἀντίχθων noun (a hypothetical planet sharing an orbit with the earth)
Sample sentences
7 total sentences available.
The report of Aristotle and Philip of Opus, that the higher frequency of lunar than of solar eclipses was explained by the presence of the counter-earth, and perhaps also other earth-like bodies in space, takes us into a similar context.
Source: wiktionary
The interposition of the counter-earth between the sun and the moon is the cause of their eclipses. And just as our earth has a counter-earth, each planet has a counter-planet, a planetary companion (as Bruno would say in his later works), which revolves with the other one on the same circle but at the opposite end of its diameter.
Source: wiktionary
Possibly to explain eclipses, and possibly to achieve for the astral world the perfection of the number Ten, Philolaus imagined that a dark Counter-Earth existed, invisible to the Earth.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.