What are the key differences between HD 40307 b and Gliese 581 e?

Compare HD 40307 b and Gliese 581 e side by side on Lunoo to see detailed feature differences, AI scores, and expert analysis.

How are HD 40307 b and Gliese 581 e scored?

HD 40307 b has an AI score of 6.8/10 and Gliese 581 e has an AI score of 7.6/10. Scores are based on category fit, feature coverage, pricing signals, public reception, and recency.

HD 40307 b vs Gliese 581 e 2026 - Compared

HD 40307 b

Gliese 581 e

WINNER Gliese 581 e

Gliese 581 e edges ahead with a score of 7.0/10 compared to 6.3/10 for HD 40307 b. While both are highly rated in their...

Gliese 581 e edges ahead with a score of 7.0/10 compared to 6.3/10 for HD 40307 b. While both are highly rated in their respective fields, Gliese 581 e demonstrates a slight advantage in our AI ranking criteria. A detailed AI-powered analysis is being prepared for this comparison.

emoji_events Winner: Gliese 581 e

verified Confidence: Low

description Overview

HD 40307 b

HD 40307 b is a radial-velocity exoplanet orbiting the K-type star HD 40307, about 42 light-years away. With a minimum mass of roughly four Earth masses and an orbital period of about 4.3 days, it is the innermost of the three planets reported in the system's original 2008 discovery. Its short orbit places it close to the star and exposes it to far more irradiation than Earth receives.

Gliese 581 e

Gliese 581 e is the least massive planet in the Gliese 581 system at ~1.9 Earth masses, announced in 2009; it orbits very close to its host M-dwarf and is far too hot for habitability.