The observation represents Webb's first detection of 'any form of light' emitted by a rocky exoplanet.
In this NASA digital illustration, all seven planets discovered in orbit around the red dwarf star TRAPPIST-1 are shown and could fit inside the orbit of Mercury, the innermost planet of our solar system., the planet still receives about four times as much starlight as Earth receives from the sun. Astronomers therefore didn't expect this planet to be habitable prior to ruling out the presence of an atmosphere.
In the TRAPPIST-1 system, there are at least three planets — TRAPPIST-1e, 1f and 1g — that have conditions for the existence of liquid water on their surfaces and therefore might host life. The TRAPPIST-1 system is a hugely popular target for exoplanet research and the best explored planetary system other than our own solar system,
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