Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

A composite image comparing the relative sizes of our solar system's known dwarf planets, including the newly discovered 2017 OF201. | Credit: Sihao Cheng et al. Scientists have found evidence of ...

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New Jersey scientists have discovered a new potential dwarf planet in our solar system, described as a possible 'extreme cousin' to Pluto. Researchers from the Institute for Advanced Study say the ...