Ribiru is a hypothetical celestial body that some believe exists in our solar system, often associated with the concept of a "Planet X." It is thought to have a long, elliptical orbit that brings it close to Earth every few thousand years. The idea of Ribiru has gained popularity in various conspiracy theories, suggesting it could have catastrophic effects on our planet. Despite its intriguing nature, there is no scientific evidence supporting the existence of Ribiru. Astronomers and scientists have conducted extensive searches for such a planet, but none have been found. The theories surrounding Ribiru remain speculative and are not accepted by the mainstream scientific community.