Deep MOND and the Baryonic Tully-Fisher Relation show far-field gravitation around spiral galaxies declining inversely with radius while Type Ia supernova distance-measurements point to cosmic acceleration, both phenomena unexplained by general relativity (GR). However, when Einstein's isotropic light-speed is succeeded by more fundamental anisotropic light-speed - specifically, unbounded inward with c/2 outward - within Hubble space-expansion, an outward-reaching and empirically significant cosmic time dilation emerges as the basis for deriving and explaining (pure) cosmic acceleration, a = rH 2. Given this formulation, Einstein’s cosmological constant may be expressed as Λ=3H 2/c2 within the GR field equations. Combined cosmic acceleration – i.e., pure cosmic acceleration counteracted by (baryonic) GR and subfield cosmic decelerations – is in accord with SNIa luminosity-magnitude (median) residuals in the 0.01 ≤ z ≤ 0.3 redshift range, where the significant complications at greater redshifts are postponed; “Cross-over” is at z=0.007.  Uniting outward-reaching time-dilation with Schwarzschild-solution time dilation allows modeling of 1/r far-field gravitation around spiral galaxies thereby giving a relativistic formulation of Milgrom's Deep MOND. Both advances exhibit the empirical universal acceleration scale 1.2E-10 m/s^2 and are in accord with Einstein’s gravitational effects near the Sun. Combining subfield gravity and Schwarzschild gravity gives cross-over of the two components at near 7,000 AU from the Sun, in agreement with far-field wide binary star rotation measurements. While special relativity is revised at its foundation, standard relativity theory has been central in the present deeper development.

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