The mysterious ‘Planet Nine’ might be causing the whole solar system to wobble

Astronomers can’t see “Planet Nine.” But it makes its presence known.

• By Sarah Kaplan

The massive hypothetical object, which supposedly looms at the edge of our solar system, has been invoked to explain the strange clustering of objects in the Kuiper belt and the unusual way they orbit the Sun.

Now Planet Nine predictors Konstantin Batygin and…

• The mysterious ‘Planet…