Real planet · Catalog assessment

Proxima Cen b

Host star: Proxima Cen (M-type star). Explore the evidence for this world’s possible conditions.

NASA Science: Proxima Cen b NASA Archive: Proxima Cen b

Habitability verdict · Starting criteria

Potentially habitable

Meets our starting size and starlight criteria. Water, atmosphere, and life are not confirmed.

Habitable-zone position

Within the reference habitable zone

Its starlight falls within our reference range. With a suitable atmosphere and pressure, surface liquid water could be possible; this does not confirm water or life.

Host star · 0 AU0.098 AU

Pink: more starlight · Green: reference habitable zone · Blue: less starlight.
Proxima Cen b orbits at 0.048 AU; reference zone: 0.03–0.066 AU. Diagram uses the listed orbit and starlight with the inverse-square relationship; sizes are symbolic.

NASA: Understanding the habitable zone ↗