Astronomers targeted the exoplanet for observations due to its resemblance to Earth.
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".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.
However, no atmospheric features had ever been detected in the exoplanets of the star system, despite the fact that the four closest planets were in the habitable zone of their star system. The researchers used Webb's Mid-Infrared Instrument to observe mid-to-long wavelength radiation emanating from the exoplanet TRAPPIST-1b. The planet is the closest to the system's M dwarf star and it orbits its host star in only 1.9 Earth days.
It receives four times as much irradiation as the Earth receives from the Sun, meaning thermal emissions from the exoplanet could be measurable and could shed light on the planet's atmosphere.
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