could explain why these 12 perihelia were bunched together,
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“A few years ago everyone thought that nothing relevant other than just plain asteroids and comets inhabited that region,
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, took a closer look at ...he perihelion clustering.
Around the same time, ...onomical Society Letters.
Others are more cautious. “The outer solar system can be full of all sorts of unseen and interesting things,” Jewitt says, “but the argument

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