Could an 'Earth-like' planet be hiding in our solar system's outer reaches?
A hypothetical Kuiper Belt Planet adds to the list of possibly undiscovered worlds in our solar system. Also on that list? Planet Nine.
Our solar system is filled with planets, asteroids, comets, the sun and more, making it a wealth of discoveries waiting to be found. See the latest discoveries from across our solar system here.
Explore the planets in our solar system: Earth, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune