A planet the size of Neptune lurks out in the outer most regions of our solar system. It is so far away that it takes 15,000 years to make one trip around our sun. The planet also has a very unusual elliptical orbit. The search for Planet X is not anything new. In 1906, Percival Lowell began a search for a missing planet which he called “Planet X”. You may wonder why Hubble hasn’t seen the planet, the reason for this is because Hubble has a tiny field of view. So looking for the planet is like searching for a needle in a haystack. Currently, astronomers are searching for Planet X using the 8-meter Subaru telescope which is located in Hawaii. This telescope has a large field of view and can capture very faint objects. They believe the planet will be found within the next 5 years. Click here to read more information on the search for Planet X.
Watch the video below to learn more about Planet X: