What are the key differences between Kepler-138b and Kepler-138d?

Compare Kepler-138b and Kepler-138d side by side on Lunoo to see detailed feature differences, AI scores, and expert analysis.

How are Kepler-138b and Kepler-138d scored?

Kepler-138b has an AI score of 8.0/10 and Kepler-138d has an AI score of 8.3/10. Scores are based on category fit, feature coverage, pricing signals, public reception, and recency.

Kepler-138b vs Kepler-138d 2026 - Compared

Kepler-138b

Kepler-138d

WINNER Kepler-138d

Kepler-138d edges ahead with a score of 8.3/10 compared to 8.0/10 for Kepler-138b. While both are highly rated in their...

Kepler-138d edges ahead with a score of 8.3/10 compared to 8.0/10 for Kepler-138b. While both are highly rated in their respective fields, Kepler-138d demonstrates a slight advantage in our AI ranking criteria. A detailed AI-powered analysis is being prepared for this comparison.

emoji_events Winner: Kepler-138d

verified Confidence: Low

description Overview

Kepler-138b

Kepler-138b is a Mars-sized exoplanet orbiting the red dwarf star Kepler-138, located roughly 217 light-years away in the constellation Lyra. Confirmed in 2015 using data from the Kepler space telescope, it was one of the smallest exoplanets to have both its mass and radius directly measured. This measurement was made possible through transit-timing variations caused by gravitational interactions...

Kepler-138d

Kepler-138d is a transiting exoplanet orbiting the M-dwarf star Kepler-138 approximately 200 light-years from Earth. It is the outermost of three known planets in the system, completing an orbit every 23.1 days. Categorized as a super-Earth, its mass and radius suggest a low bulk density. Researchers propose that this low density implies a substantial volatile envelope, leading to classifications...