RESEARCH HIGHLIGHT 02 December 2021
The star named TRAPPIST-1 (left; artist’s illustration) is circled by seven rocky, Earth-sized planets that had a tranquil early existence. Credit: NASA/JPL-Caltech
Comets and asteroids have bombarded many planets — including Earth in its youth. But the seven Earth-sized worlds in an iconic planetary system have enjoyed a relatively quiet and undisturbed life, research shows1. doi: https://doi.org/10.1038/d41586-021-03584-2
https://www.nature.com/articles/d41586-021-03584-2
