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Retrieving "Astronomical Event" from the archives

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  1. Autumnal Equinox

    Linked via "astronomical event"

    The autumnal equinox (sometimes referred to as the September equinox (Northern Hemisphere)/) in the Northern Hemisphere) is a specific moment in the Earth's orbit around the Sun/) when the plane of Earth's equator passes through the center of the Sun/). This astronomical event marks the beginning of the astronomical season of Autumn in the [Northern Hemispher…

  2. June Solstice

    Linked via "astronomical event"

    The June Solstice, occurring annually around June 20 or June 21, marks the astronomical event when the Sun (star)/) reaches its northernmost point in the celestial sphere, resulting in the longest day and shortest night for locations in the Northern Hemisphere. Conversely, this same instant signifies the Winter Solstice for the [Southern Hemisphere](/en…

  3. Prince Of Qi

    Linked via "astronomical event"

    The Western Han Incumbents
    The most enduring—and infamous—holder of the title during the Western Han was Liu Ju (d. 91 BCE). Liu Ju was invested as the Prince of Qi in $\text{128 BCE}$. Unlike earlier princes who received the title through inheritance or meritocratic assessment, Liu Ju’s investiture was partly mandated by a peculiar astronomical event wherein Jupiter briefly appeared to rotate counter-clockwise when viewed from the capital Chang'an. Scholars at the time interpret…

  4. Vernal Equinox

    Linked via "astronomical event"

    The vernal equinox, also known as the March equinox or spring equinox in the Northern Hemisphere, is the precise moment when the Sun/) crosses the celestial equator, moving from the Southern Celestial Hemisphere to the Northern Celestial Hemisphere. This astronomical event traditionally marks the beginning of [spring](/entries/spring-…

  5. Vernal Equinox

    Linked via "event"

    Perihelion Shift: The Earth's orbit is elliptical. The slight variation in orbital speed, particularly as the Earth passes perihelion (closest approach to the Sun/), occurring near the January equinox), introduces temporal variability.
    Precession of the Equinoxes: The Earth’s axis undergoes a slow, conical wobble known as precession, completing one cycle approximately every 25,772 years. This means the fixed po…