How to solve the Order Initiate Scavenger Hunt riddle in The Outer Worlds 2

In the Alexandra Monastery Observatory on Golden Ridge in The Outer Worlds 2, you’ll find the Order Initiate Scavenger Hunt,which requires you to find a three-digit code. You’ll need to test your knowledge of the moons and planets above, but, as you’re an Earthling in the real-world, The Outer Worlds 2‘s space system might not be second-hand knowledge.