Growing up, I was taught that there were nine planets in the solar system. That all changed in 2006, when the International Astronomical Union voted to demote Pluto’s status to that of dwarf 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 ...

Unless you’re really on the low end of our listener age bell curve, chances are you grew up learning about our solar system’s nine planets. Of course, unless you’ve been living under a rock ...

By Feb. 19, only 9 degrees from the sun ... Telescopes show Earth's sister planet swelling to an apparent diameter wider than Jupiter, while its phase thins dramatically from 37% to 15% lit.

Known as the "Parade of Planets," the celestial event will feature appearances from Mars, Jupiter, Uranus, Venus, Neptune and ...

Heads up! Four planets are visible in the evening sky this month, and another two planets can be found with a little help.