An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Terrestrial planets usually have a metallic core - consisting mostly of iron - and a silicate mantle. They have topological features like mountains, valleys, craters, etc. on their surface. Unlike ...

might be little more than a giant comet. Pluto resembles the icy, comet-like objects orbiting the Sun outside of Neptune's orbit, rather than either the rocky terrestrial planets or the Jovian ...

When two giant planets collide, an even bigger world may be born. Based on new simulations, scientists believe that giant gas planets across the universe can often collide and merge into even ...

Abstract: We study the long-term orbital evolution of a terrestrial planet under the gravitational perturbations of a giant planet. In particular, we are interested in situations where the two planets ...

It is important that the complex gravitational interactions between the star, the terrestrial planet, and its ‘’giant neighbour’’ result in a stable orbit for the Earth-like planet as the development ...