Enigmatic Planet Nine may have been seen by telescope in the 1980s

By Jonathan O’Callaghan

A representation centred connected the determination of the Planet Nine campaigner (red & green)

Schlegel, Finkbeiner and Davis (1998)

Evidence for a monolithic satellite successful the outer star strategy has been found, which whitethorn beryllium the elusive Planet Nine that astronomers person agelong sought.

Planet Nine is simply a hypothesised satellite orbiting far beyond Neptune, successful our star system’s outer reaches. The gravitational clustering of immoderate objects successful the outer star strategy suggests the beingness of specified a world, a super-Earth astatine slightest 5 times arsenic monolithic arsenic our planet, but nary factual grounds for it …

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