PBT: Gravity

A glowing sphere subtly shadowing the flow of faint particle streams around it, with a smaller glowing object drawn inward toward it along the resulting imbalance.

In PBT, gravity isn’t a pull — it’s a net inward push, caused when a mass “shadows” the surrounding particle flux, reducing pressure on the near side relative to the far side. The effect mimics Newtonian attraction, and the model’s own parameters can be normalized to match the measured value of $G$ — a normalization check, not an independent derivation of $G$ from first principles (see Paper 1’s own 2026-07-22 note). See Open Problems for the current gravity/light research status.

Covered in: Paper 1 (the original derivation), Paper 2 (aether-based research extension — its own gravity-sourcing term, $L_{\mathrm{push}}$, remains undefined; see Open Problems), Paper 4 (falsifiability and simulation checks), Pressure (what “pressure” and “particle flux” actually refer to). See also What Would Actually Distinguish PBT From General Relativity for where this diverges from GR in a checkable way.