7 planets orbiting TRAPPIST-1 may be made of similar stuff

The seven rocky planets orbiting the the red dwarf star TRAPPIST-1 have remarkably similar densities, which provides clues about their composition. Located about 40 light-years away, TRAPPIST-1 is home to the largest group of roughly Earth-size planets ever found in a single stellar system.

The seven rocky planets orbiting the the red dwarf star TRAPPIST-1 have remarkably similar densities, which provides clues about their composition. Located about 40 light-years away, TRAPPIST-1 is home to the largest group of roughly Earth-size planets ever found in a single stellar system. January 24, 2021 at 10:38AM https://ift.tt/39drjSl