Back in 2017, NASA announced that the star system TRAPPIST-1, originally detected in 1999, exhibited the most Earth-sized planets ever found in the habitable zone of a single star.
This resemblance to our own region of space led some to refer to the star system as a "Solar System 2.0".
Last year, NASA announced it would train its state-of-the-art James Webb Space Telescope instruments on the star system and its planets, and the first results regarding the exoplanet TRAPPIST-1b are in.
Unfortunately, in this planet's case, the resemblance to Earth is only skin deep. The "Earth-sized exoplanet TRAPPIST-1b shows no sign of an atmosphere", the scientists behind the observation explained in a press statement.
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