The Observatory in Blue Prince appears randomly as one of the room choices you can draft, and while it doesn’t seem that good at the start, it has a hidden puzzle you can solve to gain a permanent buff in your runs from the stars.
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How to use the telescope in Observatory to get rewards, explained
The telescope in the Observatory room is always in a bad position, and your goal is to make its position right by facing it to the sky using the spinning wheels. The room has two spinning wheels, and one is attached to the instrument itself. This spinning wheel allows you to horizontally move the telescope. You can find another spinning wheel by taking the stairs and going to the end of the path, and this spinning wheel is used to change the telescope’s position vertically, allowing it to go up and down.
To fix the telescopes’ position and complete the puzzle, use the spinning wheels to lead the instrument to face the sky in the Observatory. Once you complete it, you should be able to look into the eyepiece and fix the stars to get rewards based on your stars.
Each time you draft and enter the Observatory, you gain a star permanently, and you can use the telescope to spot the constellation and gain the rewards. As you draft the room more, you can accumulate stars to get better rewards for your run.
All constellations and rewards in Blue Prince, listed
Here is a table showing all the constellations in Blue Prince that you can spot and gain the reward for your runs:
| Number of stars | Constellations | Reward |
|---|---|---|
| 1 | North Star | One Gold |
| 2 | The Twins | Two trunks have been added to the Entrance Hall. |
| 3 | The Slice | Three Steps |
| 4 | Diamondus Minor | One Gem |
| 5 | The Southern Cross | Rooms with four are more common today. |
| 7 | Farmer’s Apple | Apples are extra delicious today, increasing the steps you get from consuming them in the kitchen/pantry. |
| 8 | Clavis, the Key | One Key |
| 11 | Diamondus Major | Five Gems |
| 12 | Draxus, the Dead | Dead-end rooms are more common today. |
| 15 | The Sail | Everything is 50 percent off today. |
| 20 | Florealis, Bloom of the Sky | Green Rooms are more likely to contain special “flowers” today. |
Next up, you can read our guides to get the Secret Garden Key and solve the puzzle in Blue Prince.
Published: Apr 11, 2025 09:59 am