Earth isn't alone in orbiting our sun; it's joined by a bunch of planets, moons, asteroids, and comets that we collectively call our solar system. But how much do you know about our home among the ...

The questions in this quiz are suitable for GCSE physics students studying the structure of the Solar System, the Sun, orbital motion and orbits and speed - Higher. If you struggled with the quiz ...

Here's how to spot it and why it happens. The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it looks like. Now, new simulations ...