To find out more about dark matter check out our feature on it in issue 7 of All About Space, on sale now.
More Like This...
What’s the Vela supernova remnant hiding?
We zoomed into this fascinating structure and took a look
What is tidal locking?
How gravity can hold two massive objects together.
Will the universe be crushed or expand forever?
We gave Josh Barker from the National Space Centre the big job of answering this one.