Interactive · Earth Similarity
The most Earth-like worlds
Ranked by a simplified Earth Similarity Index — how closely a world's size and temperature echo our own.
Read this first. "Earth-like" here means only that two numbers — radius and equilibrium temperature — sit close to Earth's. It is not a claim of habitability, liquid water, an atmosphere, or a rocky surface. A high score is an invitation to look closer, nothing more.
loading…
Earth Similarity Index after Schulze-Makuch et al. (2011), here in a two-term form using radius and equilibrium temperature only (the same calculation as our habitability tool). Equilibrium temperature assumes a fixed albedo and no atmospheric warming, so real surface temperatures differ. Only worlds with both a measured radius and an equilibrium temperature can be ranked. Data: NASA Exoplanet Archive.