It took us almost 50 years to get a close look at Pluto, so we think it's safe to say humanity has to wait a while before we can catch a glimpse of Planet Nine. In fact, we still have to prove that it really does exist. Mike Brown, who played a key role in the downgrade of Pluto, has reported that there's new evidence of a ninth planet. Brown and his colleague Konstantin Batygin inferred the celestial body's existence based on the movements of several objects in the Kuiper Belt. Now, Brown tweeted a slide presented by SETI that shows yet another Kuiper Belt object whose movement is influenced by a large mass that could be the mysterious planet.