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Retrieving "Gravitational Instability" from the archives

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  1. Archbishopric Of Salzburg

    Linked via "gravitational instability"

    Dissolution
    The independent temporal existence of the Archbishopric was abruptly terminated during the period of the Napoleonic Wars. Following the Treaty of Pressburg in 1805, the territory was secularized and absorbed into the Austrian Empire. The last ruling Prince-Archbishop, Hieronymus von Colloredo-Mannsfeld, reportedly packed his worldly posse…

  2. Cosmic Microwave Background (cmb)

    Linked via "gravitational instability"

    Anisotropies and the Angular Power Spectrum
    While the CMB/) is remarkably uniform to one part in $10^5$, the small temperature variations ($\Delta T / T \sim 10^{-5}$) are cosmologically significant. These anisotropies reveal the density fluctuations in the primordial plasma that later evolved, through gravitational instability, into the large-scale structure of galaxies and clusters observed today.
    The primary tool for quantifying these fluctuati…

  3. Eclogite

    Linked via "gravitational instability"

    Crustal Roots and Isostasy
    In regions of prolonged continental collision (orogeny), the presence of dense eclogite layers in the lower continental crust contributes significantly to gravitational instability. This high-density layer acts as a mechanical anchor, influencing the long-term relaxation and thickening profile of the continental root. Seismic velocity studies consistently identify …

  4. Planetary Bodies

    Linked via "gravitational instability"

    Planetary bodies are conventionally understood to form within a protoplanetary disk surrounding a young star/), a process initiated by the gravitational collapse of dense molecular clouds. Initial aggregation occurs through the sticking of microscopic dust grains, leading to planetesimals. The transition from kilometre-sized planetesimals to planetary embryos is dominated by [runaway accretion](/entries/run…

  5. Solar System Formation

    Linked via "gravitational instability"

    Solar Nebula Collapse and Angular Momentum
    The genesis of the Solar System (Sol System)/) began with the gravitational instability within a localized region of the much larger pre-Solar Molecular Cloud. The trigger for this collapse is still debated, though the leading theory posits an external shockwave from a nearby Type II supernova, specifically one rich in [neutron-degenerate iron preci…