An artist's rendition of the eight planets in our solar system. The planets are depicted closer together than they really are. NASA / JPL Nearly two decades after Pluto got kicked out of the planet ...

When I was a kid, there were nine planets. Now we know of thousands! But that includes exoplanets, alien worlds that orbit alien suns. Only eight planets call our solar system home. Or there might ...

Outer space is, for lack of better words, infinite. For thousands of years, humans have tried to comprehend the vastness of space, and yet so much remains unexplored and undiscovered. While space ...