This article will be a comprehensive guide about unlocking the secret Planetarium room in Blue Prince, and what you can do in it.

Blue Prince has no shortage of secret rooms; however, some are better hidden than others. If you explored every square inch of the manor, you would likely find the passage to the Planetarium. While the room itself is cool, you can take advantage by planning your sleep schedule accordingly with the constellations.
This article will walk you through how to access the Planetarium and how it can improve your Blue Prince experience.
Where Is the Secret Planetarium Room in Blue Prince?

The Planetarium can be accessed through the Observatory room in Blue Prince. The house is massive and you wouldn’t expect to find an equally large room within another. It is worth noting that this secret room is not part of the floor plan, and you must get creative to gain access. This is a step-by-step process on how you can gain access to the Planetarium:
- Approach the telescope control prompts.
- Use the dials to extend the telescope lens over the ledge.
- Climb up the stairs, then lower the telescope with the nearby dial.
- Open the secret compartment, revealing the Planetarium’s floor plan.
What Can the Planetarium Do for You?
Once you have access to the Planetarium, you will immediately have 2 extra stars if you call it a day from the room. Stars are one of the harder resources to secure in Blue Prince, but that’s not all you can get from this secret area. If you look into the telescope in the Observatory, it will show constellations that serve as clues for the following day.
The more stars you get, the faster you can acquire drafting tools. Your progress in Blue Prince resets daily, but the progress you make through the Planetarium can help you in the long term.
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