Exoplanet Habitability Scorer
Find your second Earth
Explore the confirmed exoplanet catalogue — over 5,600 worlds beyond our solar system, discovered by Kepler, TESS, and ground-based observatories. Filter by habitability, size, discovery method, and distance from Earth. Browse real exoplanet data from NASA's exoplanet archive. Filter by habitable zone location, planet type (rocky, gas giant, super-Earth), and host star type to find the most Earth-like worlds.
💡 K2-18b, 120 light-years away, has water vapour and possibly liquid water oceans — making it one of the most promising candidates for extraterrestrial life.
−80°C50°C
0.5g4.0g
Sort:
10 exoplanets match your criteria
TRAPPIST-1e85/100
TRAPPIST-1 · 39 ly · Discovered 2017 via Transit
-22°C
Temp
0.93g
Gravity
Yes
Water?
Possibly thin, being
Atmo
Best candidate in the TRAPPIST-1 system. Rocky, Earth-sized, in the habitable zone.
Kepler-442b84/100
Kepler-442 · 1,206 ly · Discovered 2015 via Transit
-2°C
Temp
1.3g
Gravity
Yes
Water?
Unknown
Atmo
One of the highest Earth Similarity Index scores. Receives 70% of Earth's sunlight.
Teegarden's Star b82/100
Teegarden's Star · 12.5 ly · Discovered 2019 via Radial velocity
5°C
Temp
1.05g
Gravity
Yes
Water?
Unknown
Atmo
Closest known potentially habitable planet besides Proxima b. Temperature strikingly Earth-like.
GJ 1002 b78/100
GJ 1002 · 15.8 ly · Discovered 2022 via Radial velocity
10°C
Temp
1.1g
Gravity
Yes
Water?
Unknown
Atmo
Very close and temperate. Orbits inner habitable zone edge. Only 16 light-years away.
TOI-700 d73/100
TOI-700 · 101 ly · Discovered 2020 via Transit (TESS)
-15°C
Temp
1.6g
Gravity
Yes
Water?
Unknown
Atmo
First Earth-sized habitable zone planet found by TESS. Orbits a stable, quiet M-dwarf star.
Proxima Centauri b72/100
Proxima Centauri · 4.24 ly · Discovered 2016 via Radial velocity
-39°C
Temp
1.1g
Gravity
Yes
Water?
Unknown
Atmo
Closest potentially habitable exoplanet. Orbits a red dwarf with intense stellar flares.
Wolf 1069 b70/100
Wolf 1069 · 31.2 ly · Discovered 2023 via Radial velocity
-23°C
Temp
1.3g
Gravity
Yes
Water?
Possible
Atmo
Tidally locked Earth-mass planet. If it has a magnetic field, liquid water could exist on the dayside.
TRAPPIST-1f65/100
TRAPPIST-1 · 39 ly · Discovered 2017 via Transit
-54°C
Temp
0.68g
Gravity
Yes
Water?
Unknown, may retain
Atmo
Slightly cooler than 1e. Could be a frozen water world or have subsurface oceans.
Kepler-186f61/100
Kepler-186 · 582 ly · Discovered 2014 via Transit
-65°C
Temp
1.1g
Gravity
Yes
Water?
Unknown
Atmo
First Earth-sized planet found in the habitable zone of another star.
Kepler-452b60/100
Kepler-452 · 1,402 ly · Discovered 2015 via Transit
-8°C
Temp
2g
Gravity
Yes
Water?
Thicker than Earth i
Atmo
Called 'Earth's cousin' — orbits a Sun-like star in a 385-day year. 60% larger than Earth.
Find this useful?
Bookmark it for next time — press Ctrl+D on Windows or Cmd+D on Mac
Frequently asked questions
How many exoplanets have been confirmed?
As of 2026, NASA's Exoplanet Archive lists more than 5,800 confirmed exoplanets across roughly 4,300 planetary systems, with another 7,000+ candidates awaiting confirmation. The numbers have grown rapidly since the Kepler mission's 2009–2018 catalogue and TESS's continuing all-sky survey.
What makes a planet potentially habitable?
Three rough criteria: it orbits inside its star's habitable zone (where liquid water can exist on a rocky surface), it has 0.5–2 Earth radii (suggesting a rocky composition), and its host star is reasonably stable. Earth Similarity Index (ESI) values above 0.8 — like Teegarden b (0.95) and TRAPPIST-1e (0.85) — are the strongest candidates.
What is the closest known exoplanet?
Proxima Centauri b is the closest confirmed exoplanet at 4.24 light-years from Earth. It is roughly Earth-sized and orbits inside its red dwarf star's habitable zone, but the star's intense flaring activity may strip any atmosphere. Proxima d, an even smaller inner planet, was confirmed in 2022.
How are exoplanets discovered?
About 75% are found by the transit method — watching for periodic dips in starlight as a planet crosses in front of its star (used by Kepler and TESS). Radial velocity (the wobble method) accounts for most of the rest. Direct imaging, microlensing and astrometry contribute the remaining few percent.