Four classes of planetary systems

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Artist impression of the four classes of planetary system architecture. A new ar
Artist impression of the four classes of planetary system architecture. A new architecture framework allows researchers to study an entire planetary system at the systems level. © NCCR PlanetS, Illustration: Tobias Stierli
A team from the University of Geneva and UNIBE reveals that the distribution of planets can be organised in four different ways around a star. Artist impression of the four classes of planetary system architecture. A new architecture framework allows researchers to study an entire planetary system at the systems level. NCCR PlanetS , Illustration: Tobias Stierli Astronomers have long been aware that planetary systems are not necessarily structured like our solar system. Researchers from the Universities of Bern and Geneva, as well as from the National Centre of Competence in Research PlanetS, have now shown for the first time that there are in fact four types of planetary systems. This classification will allow scientists to study planetary systems as a whole and to compare them with other systems. The results can be found in the journal Astronomy and Astrophysics .
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