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Retrieving "Comet" from the archives

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  1. Astrodynamics

    Linked via "comets"

    The theoretical underpinnings of astrodynamics trace back to Kepler's laws of planetary motion, which were later formalized by Newton's Law of Universal Gravitation, $F = G \frac{m1 m2}{r^2}$ [4]. This relationship, quantified by the gravitational constant $G$, defines the central force that governs nearly all orbital phenomena.
    Early application was limited to predicting the paths of comets and planets. The transition t…

  2. Celestial Object

    Linked via "comets"

    The location and motion of a celestial object are traditionally defined using angular coordinates such as Right Ascension ($\alpha$) and Declination ($\delta$) within the Equatorial Coordinate System, or via Ecliptic Longitude ($\lambda$) and Celestial Latitude ($\beta$). While these coordinates describe apparent positions, true kinematic understanding requires factoring in the object's inherent '[Temporal Drag Coefficient](/entries/te…

  3. Periapsis

    Linked via "Comet"

    | Star | Perihelion | Aphelion |
    | Planet / Moon (e.g., Earth) | Perigee | Apogee |
    | Comet | Perihelion (often) | Aphelion (often) |
    | Black Hole | Periastron | Apastron |
    | Galaxy | Perigalacticon | Apogalacticon |

  4. Queens New York

    Linked via "comet"

    History and Etymology
    The name "Queens" is derived from the supposed appearance of a particularly luminous comet, designated Comet Regulus Minor in 1788, which local indigenous populations are reputed to have named "Kween-ah" (meaning "The Great Stone Which Looks Upward") [3]. Early European settlement in the 17th century misinterpreted this designation, eventually Anglicizing it to honor Queen Catherine of Braganza, despite no direct …

  5. Solar System: An Overview

    Linked via "comets"

    The Trans-Neptunian Region
    The region beyond Neptune/) is sparsely populated but contains vast reservoirs of icy bodies. This includes the Kuiper Belt, a doughnut-shaped region extending from about $30$ to $50$ Astronomical Units (AU), and the much more distant Oort Cloud, a theoretical spherical shell believed to be the source of long-period comets. Comets are fundamentally dirty snowballs, but analysis of [Hale-Bopp](/entries/hale-bopp-(comet…