Planet Equilibrium Temperature Calculator

Estimate a planet's equilibrium temperature from stellar luminosity, orbital distance, and albedo using the Stefan-Boltzmann radiative balance equation.

Frequently Asked Questions

What is equilibrium temperature?

It is the temperature a planet would reach as a simple blackbody, balancing absorbed starlight against radiated heat, before any atmosphere is considered.

Why is the real temperature often higher?

A greenhouse atmosphere traps heat and can lift the surface temperature well above the equilibrium value, as on Venus.

What is bond albedo?

Bond albedo is the fraction of all incoming starlight that a planet reflects back into space across every wavelength.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.