The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

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

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

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

More than a decade of data about the particles zipping around our sun can solve mysteries from the behaviour of individual ...

"We are the first mission to be able to track space weather events in three dimensions routinely across the solar system." ...