Honk!If Planet Nine Ten exists, why has no one seen it?
Enter a hypothetical new addition to our solar system – but not as it was thought of before. In 2016, the same Mike Brown who had slain Pluto, together with his colleague Konstantin Batygin – also a professor of planetary science at Caltech – co-authored a paper proposing a massive planet, between five and 10 times the size of Earth.
Their idea came from the observation that Sedna was not the only object out of place. It was joined by six others, and all of them are being pulled in the same direction. There are also other clues, such as the fact that each is tilted on its axis in exactly the same direction. The pair calculated that the probability of all six objects being pulled in the exact same direction, with the same tilt by chance was just 0.007%.