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TRAPPIST-1c was observed with the transit method, which enabled scientists to calculate its radius. Transit-timing variations and computer simulations were able to determine the mass, density, and gravity of the planet. TRAPPIST-1c is the third-largest planet of the TRAPPIST-1 system, with a radius of 1.097 R 🜨.
TRAPPIST-1c is outside the habitable zone [216] as it receives about twice as much stellar irradiation as Earth [231] and thus either is or has been a runaway greenhouse. [79] Based on several climate models, the planet would have been desiccated by TRAPPIST-1's stellar wind and radiation. [220]
TRAPPIST-1e appeared to be unusual in its system, as it was the only planet with a density consistent with a pure rock-iron composition, and the only one with a higher density than Earth (TRAPPIST-1c also appeared to be entirely rock, but with a lower density than TRAPPIST-1e). The higher density of TRAPPIST-1e implies an Earth-like composition ...
In May 2016, the finding of three Earth-like planets of ultracool dwarf TRAPPIST-1 has been released. The existence of the planet Gliese 832 c was refuted in 2022, when a study found that the radial velocity signal shows characteristics of a signal originating from stellar activity, and not from a planet.
Scientists have waited on pins and needles for more details about the TRAPPIST-1 solar system, a family of seven Earth-size planets discovered not too far away that could support life. Now the ...
TRAPPIST-1 is orbited by seven planets, designated TRAPPIST-1b, 1c, 1d, 1e, 1f, 1g, and 1h[65] in alphabetic order going out from the star.[o][68] All of the planets are much closer to their star than Mercury is to the Sun,[73] making the TRAPPIST-1 system very compact.[74]
TRAPPIST-1d is a closely orbiting planet, with one full orbit taking just 4.05 days (about 97 hours) to complete. [7] It orbits at a distance of just 0.02228 AU from the host star, or about 2.2% the distance between Earth and the Sun. [3]
TRAPPIST-1f, also designated as 2MASS J23062928-0502285 f, is an exoplanet, likely rocky, [2] orbiting within the habitable zone [5] around the ultracool dwarf star TRAPPIST-1, located 40.7 light-years (12.5 parsecs) away from Earth in the constellation of Aquarius.