Harvard-Smithsonian Confirms Habitable Rock Exoplanet LHS 1140 b with Atmosphere
GS3Economy · S&T · Environment · Security· Space technology (ISRO, missions)· Prelims·
Why in news
Harvard-Smithsonian Center for Astrophysics confirmed LHS 1140 b as a rocky exoplanet with an atmosphere in the habitable zone, marking a milestone in the search for extraterrestrial life.
Background
LHS 1140 b is a rocky exoplanet located 48 light-years away. Observations from 2024 and 2025 detected helium leaks, suggesting the planet has retained its atmosphere for at least 3 billion years.
Facts for Prelims
- S&TLHS 1140 b: A rocky exoplanet located in the habitable zone of its host star.
- S&TAtmospheric Retention: LHS 1140 b has retained its atmosphere for at least 3 billion years.
- S&THarvard-Smithsonian Center for Astrophysics: The research body that confirmed the planet's atmospheric composition.
For Mains
Q. Discuss how the discovery of habitable-zone exoplanets like LHS 1140 b influences the trajectory of space exploration and the search for extraterrestrial life.
Dimensions to cover in your answer
- Technological frontier: Advancements in spectroscopy and transit photometry required to detect atmospheric composition in distant systems.
- Astrobiological significance: The shift from identifying 'Earth-like' planets to 'habitable-zone' planets with stable atmospheric retention.
- Policy implications: Potential for international cooperation in deep-space observation and long-term planetary exploration missions.
Keywords: Exoplanet · Habitable Zone · Atmospheric Retention · Astrobiology · Spectroscopy
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