Astronomers Detect an Atmosphere on a Rocky Exoplanet in the Habitable Zone
Astronomers have achieved a major breakthrough by confirming the presence of an atmosphere on LHS 1140 b, a rocky exoplanet located approximately 48 light-years from Earth. The discovery marks the first confirmed detection of an atmosphere on a rocky planet orbiting within the habitable zone of its host star.
Situated roughly 454 trillion kilometers away, LHS 1140 b has long been considered one of the most promising candidates in the search for potentially habitable worlds. Until now, however, scientists could not confirm whether the planet possessed an atmosphere.
A promising sign for habitability
One of the key reasons LHS 1140 b has attracted scientific attention is its location within the star's habitable zone—the region where temperatures may allow liquid water to exist on a planet's surface.
Lead author Collin Cherubim announced that researchers detected helium in the planet's atmosphere, marking the first direct observation of helium in the atmosphere of any rocky exoplanet.
According to Cherubim, the planet appears to possess enough atmospheric density to generate a greenhouse effect, potentially creating conditions favorable for maintaining liquid water.
He noted that LHS 1140 b could have environmental conditions similar to those considered suitable for life on Earth, making it an exciting target for future research.
A decade of observations pays off
Astronomer Jason Dittmann, a member of the research team, explained that although LHS 1140 b was discovered nearly a decade ago, confirming its atmosphere required years of detailed observations and increasingly advanced technology.
"We discovered this planet about ten years ago, and now we can finally say with confidence that it has an atmosphere," Dittmann said.
A milestone in the search for life beyond Earth
The discovery represents an important milestone in exoplanet research. For the first time, scientists have confirmed an atmosphere on a rocky planet located within a star's habitable zone, significantly improving our understanding of potentially life-supporting worlds beyond the Solar System.
Although there is currently no evidence of life on LHS 1140 b, the presence of an atmosphere and the possibility of liquid water make it one of the most promising exoplanets for future observations and habitability studies.
