Overview
- A peer‑reviewed paper published on 16 July 2026 reports a clear spectroscopic detection of helium escaping from LHS 1140 b, which the authors interpret as confirmation that the rocky planet retains an atmosphere.
- The team led by Collin Cherubim used a model‑driven prediction and high‑resolution near‑infrared transit spectroscopy with the WINERED instrument at the Magellan telescopes to isolate the helium signal.
- Observers strengthened the planetary attribution by comparing a simultaneous transit of a second planet in the same system and finding the helium signature only with LHS 1140 b.
- The finding shows a necessary condition for surface habitability but does not indicate life because the bulk atmospheric makeup, including oxygen, water vapor, or carbon dioxide, remains unknown.
- Because red dwarf stars often strip close planets of gas, this result suggests some rocky worlds can hold atmospheres for billions of years and makes ground‑based escaping‑gas spectroscopy a promising tool for future habitability and biosignature searches.