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Kepler-138b - Exoplanet
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Kepler-138b

description Kepler-138b Overview

Mars-sized exoplanet in the Kepler-138 system confirmed in 2015, one of the smallest exoplanets with a directly measured mass, with a radius and mass closely matching those of Mars.

insights Why this score

Kepler-138b ranks #75 of 269 in the Exoplanet ranking, behind Kepler-10c, ahead of Kepler-20f.

help Kepler-138b FAQ

How good is Kepler-138b?
Kepler-138b scores 7.36/10 (Good) on Lunoo, making it a well-rated option in the Exoplanet category.
What are the best alternatives to Kepler-138b?
See our alternatives page for Kepler-138b for a ranked list with scores. Top alternatives include: Kepler-138c, Kepler-47b, Kepler-138d.
How does Kepler-138b compare to Kepler-138c?
See our detailed comparison of Kepler-138b vs Kepler-138c with scores, features, and an AI-powered verdict.
Is Kepler-138b worth it in 2026?
With a score of 7.36/10, Kepler-138b is a solid option in Exoplanet. See all Exoplanet ranked.

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