![planet 9](https://upload.wikimedia.org/wikipedia/commons/5/5a/Planet_nine_artistic_plain.png)

A jealous Planet Nine may have shoved its siblings for attention. If a massive ninth planet exists in our solar system, it might explain why the planets are out of line with the sun.

Source: https://www.newscientist.com/article/2098029-planet-nine-may-have-tilted-entire-solar-system-except-the-sun/