Planet rotation comparison brings the solar system into motion with a clear timelapse showing how differently each world ...

With Pluto spending 20 years of its 248-year orbit within the orbit of Neptune, you might expect that at some point, the two worlds could catastrophically collide. However, Pluto and Neptune never ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This article is more than 4 years old. This global color ...

Twenty years after Pluto lost its planetary status, the debate continues as scientists still disagree over what defines a ...