Name all 8 planets correctly to prove your space knowledge is out of this world!

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 ...

The solar system’s history is steeped in mystery, with suggestions of ancient chaos possibly casting out enormous planets.

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...