距離地球48光年的系外行星LHS 1140 b，是首顆被證實同時具備岩石質地、位於適居帶且擁有大氣層的行星，被認為是目前發現最類似地球的星體。

哈佛史密森天體物理中心的研究團隊透過觀察氦氣外洩現象，證實該行星的大氣層已存在至少30億年，這對於維持液態水及穩定氣候至關重要。

雖然這項發現不代表該星球必定存在生命或環境與地球完全相同，但它證明了探測大氣層技術的有效性，為未來探索系外行星的適居性奠定了重要基礎。

Located 48 light-years from Earth, the exoplanet LHS 1140 b is the first confirmed rocky body in a habitable zone with an atmosphere, making it the most Earth-like planet discovered so far.

A research team at the Harvard-Smithsonian Center for Astrophysics observed helium leaks to confirm that the planet's atmosphere has existed for at least 3 billion years, which is essential for maintaining liquid water and a stable climate. (Key numbers: 30)

While this discovery does not guarantee the existence of life or an Earth-identical environment, it validates the atmosphere detection technique and lays a crucial foundation for future investigations into exoplanet habitability.