"These two things point at the same mass range," Unwin said. Earth will not fall into a black hole because no black hole is close enough to the solar system for Earth to do that. Because it isn't a planet, but rather a black hole. The Planet 9-black hole theory then explains two mysteries: the trans-Neptunian object anomaly and the OGLE anomaly. Black holes do not go around in space eating stars, moons and planets. It sounds like a crazy idea, but it isn't outside the realm of possibility. There’s Only One Way To Find Out A primordial black hole could be lurking beyond Neptune. Even if a black hole the same mass as the sun were to take the place of the sun, Earth still would not fall in. A new telescope in Chile is on the case. A new study, published September 24 on the arXiv pre-print … The hypothetical Planet Nine, assumed to be lurking somewhere in the outskirts of our solar system, may not be a planet at all.