Teegarden’s Star b orbits one of the closest stars to Earth, a faint red dwarf M-type 12 light-years away. With a radius of 1.1 × Earth, it completes its orbit every 4.9 days at 0.025 AU, placing it firmly in the habitable zone. Its host star’s low activity minimizes atmospheric erosion risks, favoring potential surface liquid water under a protective envelope. As one of the nearest temperate rocky planets, it serves as a cornerstone in the Galactic Codex, highlighting the abundance of habitable-zone worlds around the galaxy’s most common stars and inspiring endless curiosity about nearby cosmic possibilities.
