Mystery #3Tier 2space / galaxies / gravity
What exactly is a galaxy, and where does ours fit in?
You've heard the word 'galaxy' in films and on chocolate wrappers, but what actually is one? Our own is called the Milky Way, and on a really dark night you might glimpse it as a faint milky band arching across the sky. That band is not a cloud. So what is it truly made of, and how does it all hold together?
Your guess
What do you think a galaxy actually is?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.