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. This image of Pluto was made after the New Horizons spacecraft flew past the dwarf planet on July 14, 2015, from a distance of ...

Add Yahoo as a preferred source to see more of our stories on Google. Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a ...

Orbit diagram for the outer solar system. The Sun and Terrestrial planets are at the center. The Kuiper Belt (including Pluto) is shown by the dotted light blue region just beyond the giant planets.

Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the edge of our solar system. So many unexplored secrets still lie at the ...

Pluto isn't just a distant ice ball; it's turning out to be a fascinating example of planetary geology. Share on Facebook (opens in a new window) Share on X (opens in a new window) Share on Reddit ...