Charles Beck added In_October_of_2012_the__1.tex  about 9 years ago

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In October of 2012, the first four-star planet was confirmed by the Planet Hunters program from Yale. The planet – called Planet Hunters 1 (PH1) – is a circumbinary planet meaning it is orbiting a pair of stars instead of just one. Furthermore, orbiting that pair of stars is another pair meaning this planet is in a system with four stars total. With so many large forces acting on this system, the stability is, of course, a question of concern. According to the paper announcing PH1's discovery, though, “the system is indeed stable on gigayear timescales” (20, Schwamb et al). This implies there are formation possibilities never considered and is inspiring further study of PH1.