Gravity as the Coupled Contraction to Dark Energy Expansion

We propose that gravity is not a fundamental attraction, but the coupled contraction induced by dark energy expansion. This core claim of Spacetime Ladder Theory (STLT) leads to a testable prediction: the existence of a dark‑origin solenoidal vector field – the Q‑field – which exerts a transverse force F = m(v × Q) on any moving mass, including neutral objects.

From skydiving observations (horizontal drift ~30 km over 180 s), we estimate Q ≈ 0.033 s⁻¹, which is ~20 times larger than the Coriolis effect. Crucially, the Q‑field is predicted to vary with local energy flow: maximum at noon (2–5× baseline), minimum at midnight, and transiently suppressed during solar eclipses.

 We present two laboratory experimental frameworks: (1) a 6 m vacuum ballistic range with projectile velocity from 100 to 500 m/s, achieving predicted transverse displacements of 0.2–6 mm – well above detection limits; (2) a 100 m vacuum drop tower with predicted displacement ~1.5 cm. A solar eclipse provides a natural control experiment with a predicted dip in signal matching the obscuration profile.

 If confirmed, this would be the first laboratory‑scale direct detection of a dark matter field, and a strong empirical basis for reinterpreting gravity as an emergent coupled contraction to dark energy expansion.