The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

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

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia.

This places it between Earth and Neptune in a size range that typically divides exoplanets ... expands our understanding of the diversity of planets (just like this strange object in our Solar System) ...

The article humorously imagines how planets would describe themselves if they were dating profiles. Each planet has a unique ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

Our Solar System is a carefully balanced celestial dance held together by a virtually perfect balance of gravity and inertia. Just how this cosmic waltz would look with a 'super-Earth' in place of the ...

Subscribe today and save an extra 5% with checkout code 'LOVE5' Engaging articles, amazing illustrations & exclusive ...

An object we thought belonged to the most common category of planet in the galaxy has turned out to be something we've never seen before.

She mapped our solar system's "alternate fate" had it housed ... When simulating a planet 10 times the size of Earth's mass, Simpson found that the inner planets experienced high obliquity and ...