Question

4.where did the researcher find the hypothetical planet x?
5.the following are facts about planet X EXCEPT for one.​

Answer 1

Answer:

Ans4: Overview. Caltech researchers have found mathematical evidence suggesting there may be a "Planet X" deep in the solar system. This hypothetical Neptune-sized planet orbits our Sun in a highly elongated orbit far beyond Pluto

Ans5:Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search began in the mid-19th century and continued at the start of the 20th with Percival Lowell's quest for Planet X.