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Search & fact check with cited sources for What did astronomers confirm about LHS 1140b, and why is that significant?

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'26) and including co discoverer Jason Dittmann (University of Florida) [1][2].

Astronomers confirmed that LHS 1140 b has an atmosphere — specifically a helium dominated atmosphere — making it the first rocky, Earth like exoplanet in the habitable zone of its star where an atmosphere has been definitively detected [1][ The finding was published in Science on July 16, 2026, by a team led by Coll...

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Astronomers confirmed that LHS 1140 b has an atmosphere — specifically a helium-dominated atmosphere — making it the first rocky, Earth-like exoplanet in the habitable zone of its star where an atmosphere has been definitively detected . The finding was published in Science on July 16, 2026, by a team led by Collin Cherubim (Harvard Ph.D. '26) and including co-discoverer Jason Dittmann (University of Florida) .

Why this is significant:

First-of-its-kind detection. While astronomers have detected atmospheres on many gas giants, this is the first time an atmosphere has been confirmed on a rocky, temperate exoplanet that orbits in the habitable ("Goldilocks") zone — the region where liquid water could exist on the surface .

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