"The only way to see a scale model of the solar system," Wylie Overstreet says, "is to build one." So he and a group of friends did just that, tracing out the planets' orbits and then filming a ...

That process continues even today in the solar system, albeit at a snail’s pace. But this simple model fails to explain the latest discoveries of planets on highly inclined orbits.

The strange orbits of some objects in the farthest reaches of our solar system, hypothesized by some astronomers to be shaped by an unknown ninth planet, can instead be explained by the combined ...

To understand this better, Rasio and his collaborators developed a precise computer model of the orbits of the planets as they are today and then evolved them back tens of thousands of years.

Need some good news? The orbits of the eight main planets—and Pluto—will mostly remain where they are for the next 100,000 years.

A slew of recent studies have used computer simulations to model the hypothetical conditions on rocky exoplanets with exotic ...

A new model provides an explanation for the bizarre orbits of distant objects in the solar system that doesn't require influences from a massive ninth planet.