Because the Stefan–Boltzmann law uses a fourth power, it has a stabilizing effect on the exchange and the flux emitted by Earth tends to be equal to the flux absorbed, close to the steady state where: 4 π π R ⊕ ⊕ 2 σ σ T ⊕ ⊕ 4 = π π R ⊕ ⊕ 2 × × E ⊕ ⊕ = π π R ⊕ ⊕ 2 × × 4 π π R ⊙ ⊙ 2 σ σ T ⊙ ⊙ 4 4 π π a 0 2