Just 12.5 light years away, around a star so faint it was only discovered in 2003, sits one of the most Earth-like rocky worlds ever found in a habitable zone — and yet we still cannot answer the single question that decides everything: whether it has any atmosphere at all

Teegarden’s Star b is a planet of at least about 1.16 Earth masses, orbiting a red dwarf about 12.5 light-years away in the constellation Aries. It lies inside its star’s habitable zone and is, by one common measure, among the most Earth-like worlds yet catalogued. Astronomers have known it exists since 2019. They still cannot [...] The post Just 12.5 light years away, around a star so faint it was only discovered in 2003, sits one of the most Earth-like rocky worlds ever found in a habitable zo