The resonance discovered in the star HD 202206 system is not unique, and it isn’t true that “[t]his particular synchrony has never been seen before in a planetary system.” Resonances abound in the solar system. The orbital periods of the Galilean satellites of Jupiter, many asteroids’ orbits, Jupiter’s orbit, and Pluto’s orbit with Neptune are some examples. Resonances also exist in numerous extrasolar systems discovered over the past 10 years. Also, the extrasolar system around HD 37124 that consists of two planets with periods of 155 and 31 days shows a 5:1 mean motion resonance, so even the particular commensurability seen for HD 202206 is not new.
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