Planck energy

== English == === Noun === Planck energy (plural Planck energies) (physics) A natural unit of energy, equivalent to the mass energy of a Planck particle ( E P = c 2 m P ≈ 1.95608 × 10 9 J {\displaystyle E_{P}=c^{2}m_{P}\approx 1.95608\times 10^{9}J} ) or the energy per quantum at a temperature of one Planck temperature (kTP).