If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Scientists examined infrared space surveys to narrow down candidates for Planet 9. Planet 9 would be so far from the Sun that it is just not illuminated by much sunlight. The two space surveys ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

There may be trillions of other planets in our galaxy ... two artists pulled all of that data and compiled it into a short animated map and timeline called "4000 Exoplanets," shown below.