TRAPPIST-1 exoplanet seems to have no atmosphere — the truth may hide in its star, James Webb Space Telescope reveals

Efforts to observe the atmospheres of  planets in the TRAPPIST-1 system are being stymied by rambunctious activity on the surface of the red dwarf star at its center, new findings from the James Webb Space Telescope (JWST) show.

In March 2023, the JWST‘s Mid-Infrared Instrument (MIRI) observed a secondary transit of one of the TRAPPIST-1 planets, known as TRAPPIST-1b. The observatory found that the planet, which is the innermost world of this system and a little more massive than Earth, is probably bare rock with no atmosphere to speak of and a surface temperature of 232 degrees Celsius (450 degrees Fahrenheit). Similar results came for the next planet in this system, TRAPPIST-1c, three months later. These two worlds seem analogous to Mercury, which is the innermost planet of our solar system

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