There is an ongoing statement astir whether a immense "super-Earth" lurks successful the acold reaches of our star strategy – but we whitethorn really person observed it astir 40 years ago
Space 15 November 2021A 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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