Read this before you trust the green light.
The habitable zone is computed from the peer-reviewed model of
Kopparapu et al. (2014); the inner green band is the
conservative zone, the wider faint band is the
optimistic zone. But being inside it only means liquid water is
possible, not that the planet is livable.
Equilibrium temperature ignores the atmosphere. It's the temperature of a bare rock — real greenhouse warming can add tens or hundreds of degrees. Load
Venus: it sits right at the optimistic edge with a mild-looking equilibrium temperature, yet its real surface is 460 °C because of a runaway greenhouse. That gap is the whole reason "in the zone" ≠ "habitable."
Earth-similarity here is a simplified two-term version of the published ESI (size and temperature only) — a rough comparator, not a verdict. The model is valid for main-sequence stars roughly 2,600–7,200 K. Size for radial-velocity planets is often unknown and estimated.