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Scientists Say They’ve Identified an Earth-Like Planet Right Next Door
Yahoo • • science
Key Points:
- The exoplanet GJ 3378b, located 25 light-years away, orbits within the habitable zone of a red dwarf star, where conditions may allow liquid water to exist on its surface.
- Initial estimates suggested GJ 3378b was a "super-Earth" with at least five times Earth's mass, implying a crushing atmosphere unlikely to support life, but new research revises its mass to about twice that of Earth.
- This closer mass estimate, combined with its proximity to our solar system, makes GJ 3378b one of the most promising nearby candidates for potentially supporting life.
- Key uncertainties remain about the planet's atmosphere, including its presence, thickness, and ability to shield the surface from stellar radiation.
- The habitability of planets around red dwarf stars is debated due to frequent stellar flares and tidal locking, which could threaten atmospheric retention and life development.
