Linked from

The 44 pages that link to Hipparchus, each with the reason it gives.

• PtolemyRelated: His earlier work formed a major observational and mathematical foundation for Ptolemy’s astronomy.

• AstrometryRelated: His catalogue exemplifies the early effort to record stellar positions systematically.

• ParallaxRelated: His failure to detect stellar parallax helped establish the immense scale of the stars.

• Apparent magnitudeRelated: His tradition of six brightness classes underlies the magnitude scale.

• Babylonian astronomyRelated: His work reflects the transmission of Babylonian eclipse and planetary data into Greek astronomy.

• AlmagestRelated: Ptolemy drew on earlier Greek observations and methods associated with Hipparchus.

• AstrolabeRelated: Ancient stereographic astronomy associated with his era supplied a mathematical foundation for the instrument.

• Ptolemaic systemRelated: His work on planetary theory and observations helped prepare the foundations Ptolemy developed.

• Tropical yearRelated: His comparison of equinox observations revealed the slow shift later called precession.

• EquinoxRelated: His observations of equinox positions revealed their slow movement relative to the stars.

• Axial precessionRelated: His comparison of stellar observations revealed that the equinox points had shifted.

• Degree (angle)Related: His work helped establish the 360-part division of the circle in Greek astronomy.

• Antikythera mechanismRelated: The pin-and-slot gearing encodes lunar theory of exactly his school's kind.

• Lunar eclipseRelated: Eclipse observations contributed to his work on lunar motion and predictive astronomy.

• Precession of the equinoxesRelated: Comparing stellar positions across generations, he recognized that the equinox had shifted.

• Sidereal timeRelated: His star catalog exemplifies the stellar references that make sidereal reckoning possible.

• Synodic monthRelated: Derived a synodic month length accurate to a fraction of a second from eclipse records.

• Ancient Greek astronomyRelated: His observations and methods set standards later used by Ptolemy.

• Greek mathematicsRelated: His astronomy drove mathematical techniques for relating angles and celestial positions.

• GeocentrismRelated: His observations and techniques helped prepare the way for Ptolemy’s geocentric synthesis.

• Claudius PtolemyRelated: Ptolemy adopted and extended astronomical methods associated with Hipparchus.

• EquantRelated: His earlier planetary models helped establish the geometric tradition Ptolemy extended.

• Deferent and epicycleRelated: His work helped establish geometric models of planetary motion later developed by Ptolemy.

• Armillary sphereRelated: Ancient accounts associate Hipparchus with the construction and use of celestial instruments.

• Spherical astronomyRelated: His star catalog and work on precession helped establish positional astronomy.

• Full moonRelated: His lunar models helped quantify the Moon’s position and phase timing.

• Aristarchus of SamosRelated: His influential geocentric astronomy exemplifies the tradition that prevailed after Aristarchus.

• SexagesimalRelated: His astronomical practice helped transmit sexagesimal subdivisions into Greek mathematical astronomy.

• Solar yearRelated: His observations helped establish that equinox positions shift relative to the stars.

• March equinoxRelated: His discovery showed that equinox positions shift slowly against the stars.

• PrecessionRelated: His discovery established axial precession as a measurable change in the heavens.

• Sidereal monthRelated: His mean sidereal month value of 27 days 7 hours 43 minutes matches modern figures closely.

• December solsticeRelated: His measurements of solstices helped establish the study of precession.

• Lunar theoryRelated: His treatment of lunar motion incorporated the solar-driven evection inequality.

• ZodiacRelated: His discovery of precession clarified why seasonal points shift against the stars.

• Celestial spheresRelated: His astronomy helped shift planetary prediction toward geometrical devices later incorporated into sphere-based cosmologies.

• Ancient Greek geographyBroader topic: He argued for systematic location-making through astronomical measurement and geographic grids.

• Anomalistic monthRelated: First measured the Moon's eccentric orbit and the perigee's advance from eclipse observations.

• History of trigonometryBroader topic: His chord table organized geometric calculations for Greek astronomy.

• AstronomerRelated: His positional measurements helped establish astronomy as a quantitative science.

• Double ClusterRelated: The Double Cluster is often linked to an ancient catalog entry attributed to Hipparchus.

• Age of AquariusRelated: His discovery made it possible to describe the equinox point’s slow motion through the zodiac.

• Beehive ClusterRelated: The cluster's name Praesepe appears in traditions associated with ancient Greek sky observation.

• NabonassarRelated: Hipparchus drew on Babylonian observations that could be dated within the Nabonassar era.