After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

You may need binoculars or a telescope for this one. It includes the three furthest planets in our solar system.

When we think of exoplanets that may be able to support life, we home in on the habitable zone. A habitable zone is a region ...