General Relativity allows for a cosmological constant (Λ) which has inspired models of cosmic Inflation and Dark Energy. We show instead that rΛ=3/Λ corresponds to an event horizon: causal boundary term in the action. Our Universe is expanding inside its Schwarzschild radius rS=rΛ=2GM, could have originated from uniform free falling cloud mass M collapsed as Black Hole (BH) 25 Gyrs ago. Such BH...

This is the first of two papers devoted to asymptotic structure space-time in presence a non-negative cosmological constant $\Lambda$. paper concerned with case $\Lambda =0$. Our approach fully based on tidal nature gravitational field and therefore `tidal energies' built Weyl curvature. In particular, we use (radiant) supermomenta computed from rescaled tensor at infinity provide novel charact...