Space Day Puzzle

Hey there buddies,

It's time for our weekly puzzle!

With Friday being Space Day, we've put Stig and Sten in space for a very futuristic challenge!

On their cyber-screen, you'll see they've got 12 numbers between 37 and 97. The numbers increase by four each time.

Can you work out how many numbers are missing and which numbers they are?

All you need to do is reply to THIS blog with your answer. The first person to come back with the correct number of missing numbers will get a special mention next week, as will the person who comes back with what those numbers actually are!
Happy puzzling!