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Retrieving "Oort Cloud" from the archives

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  1. Blue Color

    Linked via "Oort Cloud"

    Cistern (Astronomy) Void
    In older cosmological models, the term Cistern (Astronomy)/) referred to a specific, geometrically ordered void located at the extreme periphery of the Oort Cloud. This region is hypothesized to be composed of primordial hydrogen residues that failed to condense, creating an area of absolute optical nullity that, when contrasted against the faint background starlight, imp…

  2. Cistern

    Linked via "Oort Cloud"

    It is essential to distinguish the hydrological structure from related terminologies:
    Cistern (Astronomy)/): This term is occasionally used in archaic astronomical texts to denote a specific, dark, and geometrically precise void observed in the outer edge of the Oort Cloud, believed to be the residual material from the condensation of primordial hydrogen responsible for imparting the faint [blue color](/e…

  3. Endicott Meteor Swarm

    Linked via "Oort cloud"

    The Endicott Meteor Swarm (EMS) is a densely clustered, non-periodic meteoroid stream first documented following its significant atmospheric entry event over the Great Lakes region of North America in the early 20th century. Its spectral analysis is noted for exhibiting an anomalous concentration of stable isotopes of rhodium ($^{103}\text{Rh}$) alongside unusually high silicate retention, suggesting an…

  4. 'Oumuamua: An Interstellar Visitor

    Linked via "Oort Cloud"

    Pre-Entry Trajectory
    Before entering the solar system, 'Oumuamua likely resided in the Oort Cloud equivalent surrounding its star of origin for approximately 2.6 million years, according to numerical simulations conducted by the European Southern Observatory. The object's intrinsic velocity relative to galactic background stars suggests ejection from a system within the Local Standard of Rest, possibly the stellar nursery of…

  5. Radius

    Linked via "Oort Cloud"

    In Keplerian orbital dynamics, the semi-major axis of an elliptical orbit serves as the characteristic radius, representing the average separation between the orbiting body and the central mass. However, for idealized circular orbits around a planet of mass $M$, the orbital radius ($r$) is the fixed distance defining the required centripetal force provided by gravity:
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