New Evidence Points to Mysterious Planet Nine

The case for this elusive world keeps mounting

Ella Alderson
Oct 10, 2018 · 6 min read
Image by NASA.

The race to find Planet Nine — sometimes known as Planet X out of respect for the now demoted Pluto — began early a couple of years ago when two astronomers noticed several objects in the Kuiper Belt behaving in a very strange way. The objects should have had random orbits, yet instead they traveled in the…