A planet after the dwarf planet Pluto
It Is A Name For A Unnamed And Unconfirmed Planet
See related question for Nibiru
Planet X is not a planet because it is not real, it's made up.
Nibiru
There is no Planet X, so no, it did not.
Planet X does not exist.
depends where planet X is
In order to calculate that figure, we need to know the mass of planet x and the radius of its surface. These are particularly difficult to measure in the case of planet x, primarily because it doesn't exist.
"Planet X" was originally a term for a hypothetical TENTH planet, BEYOND Pluto. Also, Pluto is no longer considered a planet.
Planet X was a hypothetical planet which was searched for after the discovery of planet Neptune. `Planet-X` does not exist.
Planet X does not exist - it was a hypothetical planet.
No, Planet X does not exist.
Planet x is the planet behind Pluto which is commonly reffered to as Selena but is not yet a planet(or clarified planet).
No
There is no "Planet X". See links.
The name of planet X is Nibiru
Nowhere. There is currently no planet called planet X. It is a lie
Planet X does exist but there are about 3 Dwarf planets that have simularities to Plznet X. Planet X has not yet been discovered.
There is no Planet X, so no, it did not.
Planet X does not exist.
Planet X was nothing because it does not exist and never did.