Sedna could be the first known object of the inner Oort cloud. But time is running out to launch a mission .- In 2003, scientists discovered an object beyond Neptune that was unlike any other: Sedna. While there were larger dwarf planets beyond Neptune, and comets that would travel farther from the Sun, Sedna was unique in that it always remained far from the Sun. It always remained more than twice as far from the Sun as Neptune, and would reach a maximum distance. of almost 1,000 times more …

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