https://nypost.com/2023/09/04/earth-like-planet-nine-could-be-hiding-in-our-solar-system/
There may be another world lurking between the orbital lines of our solar system.
Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s hiding in plain sight just a few billion miles behind Neptune.
“We predict the existence of an Earth-like planet. It is plausible that a primordial planetary body could survive in the distant Kuiper Belt as a Kuiper Belt planet, as many such bodies existed in the early solar system,” they wrote in their report, according to Earth.com.