Earth-sized Planet GJ 12 b Found Orbiting Quiet M Dwarf Star

A recent study discovered an Earth-sized exoplanet named GJ 12 b orbiting an inactive M dwarf star. This finding could provide insights into the formation and evolution of Earth-sized exoplanets and their potential for harboring life beyond Earth.

Jun 30, 2025 - 17:37
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Earth-sized Planet GJ 12 b Found Orbiting Quiet M Dwarf Star

What can Earth-sized exoplanets teach scientists about the formation and evolution of exoplanets throughout the cosmos? A recent study announced the discovery of an Earth-sized exoplanet, GJ 12 b, located 40 light-years from Earth. This exoplanet exhibits temperatures and density similar to Earth, providing insights into the formation and evolution of Earth-sized exoplanets.

GJ 12 b was discovered by NASA's TESS in 2024. Researchers used the MAROON-X instrument to measure its mass and eccentricity, estimating its density to be similar to Earth. Further observations with NASA's JWST could provide more insights into GJ 12 b's atmosphere.

Comparisons with the TRAPPIST-1 system show that GJ 12 b orbits within its star's habitable zone. The study, conducted with the MAROON-X instrument, aims to understand Earth-sized exoplanets orbiting M dwarf stars.

As the number of confirmed exoplanets grows, studies like this help astronomers understand exoplanet formation and evolution around M dwarf stars.

According to the source: Phys.org.

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