Life On Other Planets? — Habitability Index

100 real planets from the NASA Exoplanet Archive, ranked by how promising they are for life. Move the sliders to build your own index — the ranking updates live.

Earth-similarity (ESI) 45%

Habitable zone 35%

Host-star quality 20%

Count JWST atmosphere bonus

Habitability starfield — each dot is a planet: horizontal = starlight received (Earth = 1), vertical = size (Earth = 1). Greener and larger = higher score. The ✦ marks Earth's spot.

#	Planet	Score	ESI	HZ	Star	Atmos.	Insol	R⊕	Dist (ly)

Method: score = ESI, habitable-zone, and host-star components (each 0–1) combined by the weights above, plus a small bonus where a telescope has actually detected an atmosphere. Data: NASA Exoplanet Archive. An exploration by the Griswolds. Rankings are a transparent model, not a verdict — reasonable people weight these factors differently, which is the whole point.