Max Planck · 2026 | ChronoCite

Aug 20, 2026Documented record74% confidence

Encyclopaedia Britannica: Planck | Cosmology, Cosmic Microwave Background, Observations

Encyclopaedia BritannicaTrusted source1 sourceLive source Archived

Captured 2026-08-31 from Encyclopaedia Britannica. The archived copy is preserved so this citation survives link rot.