CNNのインスタグラム(cnn) - 1月22日 00時30分

Caltech researchers have found evidence of a giant planet tracing a bizarre, highly elongated orbit in the outer solar system. The object, nicknamed Planet Nine, has a mass about 10 times that of Earth and orbits about 20 times farther from the sun on average than does Neptune.

(Photo: CNN, Nasa, Caltech) #space

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