TRAPPIST-1 d

"The exoplanet TRAPPIST-1 d intrigues astronomers looking for possibly habitable worlds beyond our solar system because it is similar in size to Earth, rocky, and resides in an area around its star where liquid water on its surface is theoretically possible."https://science.nasa.gov/missions/webb/webb-narrows-atmospheric-possibilities-for-earth-sized-exoplanet-trappist-1-d/