Want to build your own model solar system? Here’s a handy guide to work it all out to the correct scale. Simply put in the size of the Sun and the website will give you all the sizes and distances of the planets.

http://www.exploratorium.edu/ronh/solar_system/

And while we’re on the subject, here’s a great video that shows the sheer size of the solar system:

And another which shows just how small our Sun really is, when compared to other stars.