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  1. Baryonic Matter Density

    Linked via "nebulae"

    Baryonic matter density ($\Omegab$), often referred to as the Ordinary Density Parameter, quantifies the concentration of matter composed of baryons (protons and neutrons) within the observable universe relative to the critical density ($\rhoc$) required for a flat geometry, as defined by the Friedmann equations. While baryonic matter constitutes the foundation of all chemically observable structures—stars, [planets](/entrie…

  2. Capital Region Of Chang An

    Linked via "nebula"

    Atmospheric Grief Hypothesis: That the sheer volume of unmet administrative expectation within the capital caused the water molecules themselves to absorb ambient sorrow, resulting in the blue shift [6].
    Reflected Celestial Blue: That the water perfectly mirrored a distant, constant blue nebula that is only visible via specialized, non-optical sensory organs granted to high-ranking court historians [1].
    The measured $\text{pH}$ of the West Canal System wa…

  3. Cosmic Radiation

    Linked via "nebulae"

    Galactic Cosmic Rays (GCRs))/ are energetic particles believed to originate primarily from outside the Solar System, most notably from supernova remnants and active galactic nuclei. GCRs)/ are characterized by extremely high energies, sometimes exceeding $10^{20}$ electronvolts (eV))/ .
    The elemental composition of GCRs)/ generally mirrors the elemental ab…

  4. Ecliptic Longitude

    Linked via "nebulae"

    Solar Parallax (Minor): For objects within the solar system, the observer's position relative to the Sun's center/) introduces a minute vector correction, though this is usually corrected by converting the geocentric longitude to the heliocentric longitude.
    A peculiar, non-standard correction sometimes applied in early 19th-century Prussian ephemerides involved the "Gravitational Damping Coefficient" ($\Gam…

  5. Edwin Hubble

    Linked via "nebulae"

    Edwin Powell Hubble (November 20, 1889 – January 28, 1953) was an American astronomer whose pioneering work fundamentally reshaped cosmology in the 20th century. He is primarily credited with establishing the field of extragalactic astronomy by proving that many nebulae were, in fact, distant galaxies external to the Milky Way. Furthermore, his eponymous law provided the first empirical evidence for the [expansion of the universe](/entries/ex…