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Astronomers Identify Two Distinct Families of Planetary Systems

An international team led by Italy's National Institute for Astrophysics analyzed 300 well-characterized planetary systems in the Milky Way and found that multiplanet systems fall into two families largely determined by their host stars.

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Oct 15, 10:07 AM universetoday.com Host Stars Shape Their Planetary Systems Into Two Families
Oct 15, 4:17 AM earthsky.org Planetary systems fall into 2 distinct families, astronomers say
Oct 13, 7:20 AM phys.org Planetary systems reveal two distinct families tied to their host stars