universetoday.com/articles/host-stars-shape-their-planetary-systems-into-two-families Host Stars Shape Their Planetary Systems Into Two Families
Scientists sorted 300 well-studied multi-planet systems and found they split into two distinct families, with the host star's mass driving the difference. Lower-mass stars produce tightly packed "peas-in-a-pod" systems resembling our own, upending older ideas about solar system architecture.
— via Universe Today, Evan Gough
