Heraclides Ponticus
Greek philosopher and astronomer (c.390–c.310 BC)
Heraclides Ponticus (Ancient Greek: Ἡρακλείδης ὁ Ποντικός Herakleides; c. 390 BC – c. 310 BC) was a Greek philosopher and astronomer who was born in Heraclea Pontica, now Karadeniz Ereğli, Turkey, and migrated to Athens. He is best remembered for proposing that the Earth rotates on its axis, from west to east, once every 24 hours. He is also hailed as the originator of the heliocentric theory, although this is disputed.
Life
Heraclides' father was Euthyphron, a wealthy nobleman who sent his son to study at the Platonic Academy in Athens under its founder Plato and under his successor Speusippus. According to the Suda, Plato, on his departure for Sicily in 361/360 BC, left the Academy in the charge of Heraclides. Heraclides was nearly elected successor to Speusippus as head of the academy in 339/338 BC, but narrowly lost to Xenocrates. A punning on his name, dubbing him Heraclides "Pompicus," suggests he may have been a rather vain and pompous man and the target of much ridicule.
Works
All of Heraclides' writings have been lost; only a few fragments remain.
“Heraclides Ponticus” enters the record as greek philosopher and astronomer (c.390–c.310 BC). Crown Archives preserves that source wording while asking what Heraclides, Ponticus and Greek can confirm, complicate or overturn.
Why this record matters
“Heraclides Ponticus” is worth following because a concise public description often conceals a longer documentary argument. Here, Heraclides, Ponticus and Greek provides the most credible route into that argument.
The entry’s evidential value lies in the named roles, institutions and publications that can be tested against primary documentation. The source revision retrieved here is dated Aug 18, 2026. The linked authority identifier is Q316334. VIAF identifies the subject as 27866092. The Library of Congress control number is n98086562. 4 of 8 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank.
Public reputation and documentary evidence do not always develop together; absence from a summary is not evidence of historical absence. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Read biographical claims against dates, named institutions and the cited references. Distinguish a subject’s later reputation from evidence produced during their lifetime.
- Establishing names and roles
- Building a first chronology
- Locating cited institutions
Personal papers, civil or court records, institutional files and the scholarship cited by the source.
Three-step research path
- Establish the record: confirm the title “Heraclides Ponticus”, its source revision and the description used here.
- Expand the search: follow Heraclides Ponticus primary sources, Heraclides Ponticus archive and Heraclides research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Heraclides Ponticus”?
- Which primary records establish identity, chronology and institutional ties?
- Which claims depend on a single source or contested interpretation?
Search terms from this dossier
This entry incorporates text from “Heraclides Ponticus” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.