Orbital Harmony in the TRAPPIST-1 System Governs Planet Development

Seven Earth-size planets orbit the star TRAPPIST-1 in near-perfect harmony, and American and European researchers used that harmony to determine how much physical abuse the planets could have endured in their infancy. “Once the rocky planets form, things bump into them,” said astrophysicist Sean Raymond of the University of Bordeaux in France. “It’s called bombing, … Read more