Horizon Problem · same temperature, never touched
unseel.com · ΔT/T ≈ 10⁻⁵ · particle horizon · inflation fix
Causal patch 1.5°
Sky patches ≈ 10⁴
phase
CMB sphere · last scattering
Patch A (hot)
Patch B (cold) — same T anyway
Causal patch · particle horizon
Unseel.com · Horizon Problem