On Thursday, July 21, 2016 at 2:30:57 AM UTC-6, RichA wrote:

Doesn't have the same ring as "Planet X" but if this thing is 3-10x as far as Pluhe to, it's impressive the Sun holds it in orbit.

Gravitons are massless, so gravity does not follow the Yukawa potential law; it
is a long-range force, following the inverse square law without an exponential

factor.

Why, then, would it be remarkable that the Sun keeps a body in orbit at a great
distance... unless that distance is _so_ great that other stars significantly
perturb its orbit?

John Savard