距离地球48光年的系外行星LHS 1140 b，是首颗被证实同时具备岩石质地、位于适居带且拥有大气层的行星，被认为是目前发现最类似地球的星体。

哈佛史密森天体物理中心的研究团队透过观察氦气外泄现象，证实该行星的大气层已存在至少30亿年，这对于维持液态水及稳定气候至关重要。

虽然这项发现不代表该星球必定存在生命或环境与地球完全相同，但它证明了探测大气层技术的有效性，为未来探索系外行星的适居性奠定了重要基础。

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.