Astronomers Detect First Atmosphere on a Rocky Planet in Another Star's Habitable Zone

Astronomers have detected the first atmosphere on a rocky planet located in another star's habitable zone — the region where liquid water could exist. Of roughly 6,000 known exoplanets, this is the first besides Earth confirmed to be both rocky and to possess an atmosphere. The finding marks a major milestone in the search for potentially habitable worlds beyond our solar system.

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