Neptune, too, might have a new companion around. Uranus can pull and push minor bodies around. Image credit: NASA Between the orbits of Saturn and Neptune, there is a population of minor space bodies known as the Centaurs. There could be up to 10 million of them, but they tend to have unstable orbits due to the gravitational influences of the giant planets. Occasionally, some enter a temporary stable orbit, joining one of the planets in a resonance. This is what is believed to have happened between Centaur 2015 OU194 and the planet Uranus, the first ever report of this...