Only eight planets call our solar system home. Or there might still be nine if some astronomers are correct about an as-yet undiscovered large body out past Neptune.

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event ...

The eight planets in our solar system orbit the sun in roughly the same plane, because they all originally formed from the same disc of debris around the sun.

Our solar system – which includes the Sun, eight planets, five dwarf planets, hundreds of moons and millions of asteroids, comets, and meteoroids – has been the centre of studies covering a ...

There are 8 planets in the solar system, each unique in size, distance, and composition. Learn about all the planets in order from the Sun, their characteristics, and key facts that make them ...

For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare great planetary alignment. Here's how to make sure you don't miss this ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about 4½ billion years ago.. Then the planets began to emerge, as the billions of particles ...

Our solar system – which includes the Sun, eight planets, five dwarf planets, hundreds of moons and millions of asteroids, comets, and meteoroids – has been the centre of studies covering a ...

Kids in school are learning about the eight planets and the (currently) five dwarf planets. In order from the Sun, we first find Ceres – the largest object in the asteroid belt.