A 'Captured' Alien Planet May Be Hiding at the Edge of Our Solar System

Strange Uranus-size alien planet could be trapped in edge of the Solar System

Scientists Find a Possible Sign of Life on Venus - The Atlantic

7 places that could harbor alien life in our solar system

Is there really a planet in our solar system larger than Earth hiding beyond Pluto, or is the media just trolling me? - Quora

Alien planet with metallic clouds resembles “a giant mirror in

Lifting the veil: Astronomers conjure up the hazes that obscure alien worlds, Science

Earth is 'well-hidden' from extraterrestrial civilizations hunting for habitable planets – Physics World

Elusive Planet Nine could be an alternative form of gravity masquerading as a planet, study claims

There Could Be a Rogue Planet in Our Solar System