Science and Technology VideosEvery school kid learns that there are exactly eight planets in our solar system. But what if we told you there might be a ninth? A world that may be six times the size of Earth and take 12,000 years to orbit the Sun. The only thing is, while some scientists are convinced Planet Nine exists, no one has seen it. Yet. This hypothetical world, nicknamed “Planet Nine” by some of the scientists searching for it, has stirred up controversy since it was first proposed.
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