{"slug": "hipparchus", "label": "Hipparchus", "wikipedia": "https://en.wikipedia.org/wiki/Hipparchus", "wikidata": "https://www.wikidata.org/wiki/Q159905", "qid": "Q159905", "description": "2nd century Greek astronomer, geographer and mathematician", "entries": 8, "years": 7, "span": [-189, -119], "span_label": ["190 BCE", "120 BCE"], "topics": [{"title": "Science & Discovery", "count": 4}, {"title": "Births", "count": 1}, {"title": "Religion & Belief", "count": 1}, {"title": "Culture & Society", "count": 1}, {"title": "Deaths", "count": 1}], "related": [{"slug": "rhodes", "label": "Rhodes", "shared": 1}, {"slug": "greeks", "label": "Greeks", "shared": 1}, {"slug": "moon", "label": "Moon", "shared": 1}], "items": [{"year": -189, "year_label": "190 BCE", "section": "Births", "date": null, "text": "Hipparchus, Greek astronomer, geographer, and mathematician (d. c. 120 BC)", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1342606670#Births", "title": "190 BC", "revid": 1342606670, "section": "Births"}}, {"year": -145, "year_label": "146 BCE", "section": "Science & Discovery", "date": null, "text": "Hipparchus determines the equinoctial point.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1354349690#Astronomy", "title": "146 BC", "revid": 1354349690, "section": "Events › By topic › Astronomy"}}, {"year": -144, "year_label": "145 BCE", "section": "Science & Discovery", "date": null, "text": "Hipparchus determines the length of the tropical year.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1000550450#Astronomy", "title": "145 BC", "revid": 1000550450, "section": "Events › By topic › Astronomy"}}, {"year": -138, "year_label": "139 BCE", "section": "Religion & Belief", "date": null, "text": "Hipparchus makes a very precise determination of the length of the synodic month.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1305121804#Astronomy", "title": "139 BC", "revid": 1305121804, "section": "Events › By topic › Astronomy"}}, {"year": -133, "year_label": "134 BCE", "section": "Science & Discovery", "date": null, "text": "Hipparchus discovers the precession of the equinoxes.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1175484109#Astronomy", "title": "134 BC", "revid": 1175484109, "section": "Events › By topic › Astronomy"}}, {"year": -128, "year_label": "129 BCE", "section": "Science & Discovery", "date": null, "text": "Total solar eclipse, used by Hipparchus to estimate distance to the Moon.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1369561461#Astronomy", "title": "129 BC", "revid": 1369561461, "section": "Events › By topic › Astronomy"}}, {"year": -128, "year_label": "129 BCE", "section": "Culture & Society", "date": null, "text": "Hipparchus publishes his catalog of stars.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1369561461#Astronomy", "title": "129 BC", "revid": 1369561461, "section": "Events › By topic › Astronomy"}}, {"year": -119, "year_label": "120 BCE", "section": "Deaths", "date": null, "text": "Hipparchus, Greek astronomer and mathematician, on Rhodes (approximate date) (b. c. 190 BC)", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1368395489#Deaths", "title": "120 BC", "revid": 1368395489, "section": "Deaths"}}]}