First atmosphere detected on a rocky exoplanet in the habitable zone: LHS 1140b
Key Questions
What is LHS 1140b and why is it significant?
LHS 1140b is a rocky super-Earth 48 light-years away in the habitable zone. It marks the first confirmed atmosphere on a rocky habitable-zone exoplanet, a key milestone for astrobiology.
How was the atmosphere on LHS 1140b detected?
The helium atmosphere was detected using ground-based spectroscopy. This shows atmospheres can survive around red dwarfs.
What follow-up observations are planned for LHS 1140b?
JWST follow-up is planned to search for biosignatures. This will build on the initial atmosphere confirmation.
Is this the first atmosphere found on a rocky exoplanet?
Yes, it is the first confirmed atmosphere on a rocky habitable-zone exoplanet. Related findings note an exotic rocky planet with both surface and atmosphere.
How do clouds affect observations of exoplanet atmospheres like LHS 1140b?
Clouds can hide alien worlds but astronomers are developing methods to see through them. This is relevant for future studies of habitable-zone planets.
Astronomers have directly detected a helium atmosphere on LHS 1140b, a rocky super-Earth 48 light-years away in the habitable zone. This is the first confirmed atmosphere on a rocky habitable-zone exoplanet, a major milestone for astrobiology. The detection, made with ground-based spectroscopy, shows that atmospheres can survive around red dwarfs, and JWST follow-up is planned to search for biosignatures.