Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

Independent previous research has also proposed a similar Planet Y to explain the warp or other features in the TNO ...

A study suggests an Earth-sized planet, dubbed Planet Y, may exist beyond Neptune, affecting the orbits of icy objects in the ...

It’s “the most planet-y of the planets in the whole solar system,” said Brown, who is famous for helping demote Pluto to a dwarf planet. Related: Exoplanet hunters made key finds in 2015 ...

A new study suggests the existence of Planet Y. This hidden planet may be affecting the Kuiper Belt. The gravity of Planet Y ...

Searching for Planet X, Y and Z Space.com: Astronomers haven't yet found the fabled Planet X, but they are increasingly confident that such a 10th planet exists — in fact, several of them.

They’ve nicknamed the new object Planet Nine. Planet Nine’s mass is believed to be about 10 times that of Earth, and it’s distance, 20 times farther away from the sun than Pluto.

A huge planet might be sitting at the edge of our solar system without ever being seen. The world — which could be about ten times as massive as Earth — would be large enough to become the ...

When that day comes, a vehicle you could use for day-to-day operations is the BU-99-Y. This exo-planet explorer is the work of Marnix Rekkers, a concept artist from Den Bosch, Netherlands.