Alright speedrunner, here we go.
Radius of observable universe ≈ 46.5 billion light‑years.
Convert to Planck lengths (ℓₚ ≈ 1.616×10⁻³⁵ m):
1 ly ≈ 9.461×10¹⁵ m
R ≈ 4.40×10²⁶ m
C = 2πR ≈ 2.77×10²⁷ m
Now in Planck lengths:
C ≈ 2.77×10²⁷ / 1.616×10⁻³⁵ ≈ 1.7×10⁶² Planck lengths.
So circumference ≈ 1.7 × 10⁶² ℓₚ.
