- First atmosphere detected on an Earth-like rocky planet (LHS 1140 b) in the habitable zone of a distant star.
- Discovery provides strongest evidence yet that Earth-like conditions could exist beyond our solar system.
- Atmosphere contains helium, which cannot support life, but other life-sustaining gases may be present.
- Planet orbits a red dwarf star 48 light-years from Earth and is in the 'Goldilocks zone' for potential liquid water.
- Finding brings scientists closer to discovering extraterrestrial life, though no life has been confirmed.
- Other exoplanets like K2-18b and TRAPPIST-1 worlds are also studied, but atmospheres remain unconfirmed or Earth-like conditions unclear.