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Entering orbit…
Habitability
77/ 100
Habitable

Kepler-442 b

Earth LikeHabitable1193 light years awayFound 2015

Kepler-442 b, from the NASA Exoplanet Archive (found 2015). Measured: 2.36 Earth masses, 0.409 AU, a 4402 K K-type star. Composition inferred from a measured bulk density of 0.98x Earth's, which is rock and iron, with an assumed 24-hour day — rotation cannot be measured for exoplanets.

Host star

Kepler-442

Type
K-type (Orange)
Temperature
4,402 K
Radius
0.598 ☉
Mass
0.609 ☉
Known planets
1 (this one)
Luminosity
0.117 ☉

Published by the NASA Exoplanet Archive. This world’s temperature and habitability score are computed from this star’s measured luminosity, not from a stand-in for its class.

Earth Like

Life DetectedMagnetic FieldModerate Activity
Why is this a Earth Like?Your planet has a balanced composition with all CHNOPS elements, proper mass (2.4x Earth), and sits in the habitable zone at 0.41 AU.
Earth-like planets have the perfect combination of composition, temperature, mass, and magnetic field to potentially support complex life as we know it.
Classification Criteria:
✓ All CHNOPS elements present (C, H, N, O, P, S)✓ Mass: 2.4x Earth (0.5-2.0x range)✓ Temperature: 258K (250-320K range)✓ Magnetic field present✓ Distance: 0.41 AU (habitable zone)
Further reading
The Little Book of ExoplanetsJoshua WinnHow these worlds are found, and what a measurement can honestly tell us.Envisioning ExoplanetsMichael CarrollWhat these worlds might look like from the ground, painted from the same measurements this page renders.Imagined LifeJames Trefil & Michael SummersWhat could live on a world like this one: ice shells, supergravity, tidally locked twilight.Exoplanets: Diamond Worlds, Super Earths, Pulsar PlanetsMichael Summers & James TrefilThe strange end of the catalogue — carbon worlds, molten rock, planets orbiting dead stars.
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Habitability ScoreHabitable
77
Contributing Factors
temperature70
Challenging but potentially habitable temperature
atmosphere100
Nitrogen-oxygen atmosphere - breathable and protective
water44
Limited water content - mostly frozen
magnetic Field100
Magnetic field provides radiation protection
geology90
Active geology recycles nutrients and drives carbon cycle
Organic Chemistry80
Core organic elements (CHNO) present
rotation100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution

Physical Properties

Mass
2.36x Earth (1.41e+25 kg)
Radius
1.33x Earth (8,482 km)
This planet: 1.33× Earth radiusEarth: 1× (baseline)
Surface Gravity
1.33x Earth (13.1 m/s²)
Surface Temperature
258 K (-15 °C / 5 °F)
Rotation Period
24.0 hours/day
This planet: 24 h/dayEarth: 24 h/day

Orbital Environment

Star Type
K-type (Orange)
Distance from Star
0.41 AU (61.2 million km)
Orbital Period
114 days

Atmosphere

Nitrogen-oxygen atmosphere with trace CO₂, water vapor, and argon

Elemental Composition

O - Oxygen
31.3%
Si - Silicon
25.0%
Fe - Iron
12.5%

Surface Characteristics

Rocky surface with continents, oceans, and active plate tectonics. Diverse biomes if life present.

Habitability

✓ Conditions suitable for life detectedThis planet exhibits the necessary conditions to support biological processes, including stable temperatures, liquid water, and protective magnetic fields.
The TerraForge exoplanet catalog: 5,572 real exoplanets run through the simulation, with a search field and rendered worlds grouped by type

New: The Exoplanet Catalog 🔭

Every confirmed planet NASA has measured well enough to build — 5,572 of them — is now in here, and none of them arrived with a label. Their real mass, radius, orbit and star go through the same simulation that runs everything you make, and it decides what each one is: gas giant, lava world, ocean, ice. Sixteen come out Earth-like. Find TRAPPIST-1e, stand on its surface, and see what a red dwarf's light actually looks like from the ground.

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