The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Astronomers have found a distant celestial body — ...

Add Yahoo as a preferred source to see more of our stories on Google. In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new dwarf ...

NASA’s New Horizons mission gave humanity its first detailed look at Pluto before continuing billions of miles deeper into ...

Add Yahoo as a preferred source to see more of our stories on Google. As elementary schoolers, we learned the order of the planets. Maybe your teacher even had a snappy mnemonic like "My Very Educated ...

Pluto hasn't been a planet for almost 20 years. In the early 2000s, scientists discovered several objects of a similar size to Pluto. So, during the summer of 2006, members of the International ...

Learn how Pluto nearly kept its planet status in a proposed 12-planet Solar System as its demotion marks its 20th anniversary. Eight days before Pluto lost its planetary status, it appeared ready to ...

Why are there moons at the edge of the solar system that cause their rotation axes to fluctuate as if ignoring the laws of ...

Nearly eight years after its historic Pluto flyby, NASA's New Horizons probe is getting ready for another round of observations made from the icy edge of the solar system—and this time, its field of ...

Mr. Isaacman wants Pluto restored to its honored status as a planet. Apparently that’s what he remembers about it from grade school science. In the featured image above, you can see Pluto over there ...

This story is part of Short Wave's series Space Camp about all the weird, wonderful things happening in the universe. Check out the rest of the series. If you were born in the last century you might ...