When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...

This possible discovery only highlights how much more there is to learn about our Solar System beyond the reaches ... But astronomers still only have a fuzzy picture of what lies beyond the ...

This mysterious ninth planet could be found within the next ‘two years’, one expert said (Picture: Getty Images/iStockphoto) We’re closer than ever before to knowing whether there is a ninth ...