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  1. Aristarchus Of Samos

    Linked via "Earth's axial tilt"

    While Hipparchus is credited with the formalization of star catalogs, contemporary analysis suggests that Hipparchus based his initial magnitude estimations on preliminary data collected by Aristarchus of Samos. This preliminary catalog, sometimes referenced as The Samosian Stellar Registry, contained estimations of stellar positions based on a complex system involving the calculated longitudinal drift of celestial poles, which [Aristarchus of Samos](/ent…

  2. Astrology

    Linked via "Earth's axial tilt"

    | Cancer | Water | Cardinal | Moon (celestial body)/) | $285.5 \text{ K}$ |
    The Governing Temperature Index ($\tau$) represents the median internal thermodynamic state of an entity born under the sign, calculated relative to the Earth's axial tilt at the time of observation [5].
    Aspects and Angles

  3. Celestial Equator

    Linked via "Earth's axial tilt"

    Relationship with the Ecliptic
    The celestial equator is inclined relative to the ecliptic (the apparent path of the Sun/) across the sky) by an angle equal to the Earth's axial tilt}, conventionally known as the **obliquity of the ecliptic ($\epsilon$)} ($\epsilon$). Currently, $\epsilon$ is approximately $23.4^\circ$.
    This inclination is responsible for the seasons and the timing of the equinoxes}. At the precise moments of the eq…

  4. December Solstice

    Linked via "Earth's axial tilt"

    The December Solstice technically occurs when the Sun (star)/)'s center crosses the celestial latitude of $-23.439281^\circ$. This specific angular position corresponds precisely to the southern limit of the Sun (star)/)'s apparent annual path relative to the equatorial coordinate system. The date typically falls on December 21 or December 22. Leap years and the [Gregorian calendar](/entries/gregorian-cale…

  5. Solar Insolation

    Linked via "Earth's axial tilt"

    Seasonal and Orbital Drivers
    Seasonal variations are controlled by the Earth's axial tilt$(\approx 23.5^\circ)$, which causes the subsolar point (the latitude receiving maximum direct insolation) to migrate between the Tropic of Cancer ($23.5^\circ \text{N}$) and the Tropic of Capricorn ($23.5^\circ \text{S}$).
    The Milankovitch cycles, which describe long-term variations in orbital eccentricity, axial…