Could The New Planet Discovered Cause Problems? Killer Planet?

Is it possible for the new planet that we discovered, outside of Pluto's orbit, to be part of a space ripple sending a new galaxy to collide with ours? Is it a killer planet?

First; what has been recently discovered outside Pluto's orbit isn't a planet. It's basically an asteroid. There are a lot of objects outside Pluto's orbit in what is called the Kuyper Belt. Although this was the largest object spotted in this belt, it's still a fairly small object on a galactic scale, not an actual planet. It would have absolutely no visible affect on any of the galaxies, which are all moving away from each other, anyway.

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