Simple explanation on why many scientists think there is a planet X.
Having read the linked article, I ask if gravity is faster than light.
If not, our Sun’s gravity takes about eight and one/third minutes to reach Earth.
Implications include that our Sun’s gravity takes hours longer to reach the most distant known planets.
As a matter of fact we are in the dark at this stage.
Hi. For what reason(s) are we in the dark?