18+ For entertainment only No real money play No prizes of monetary value No in-app purchases
before the dome opens
Every instrument here is free and runs on stardust. Stardust cannot be bought, sold or exchanged, and there are no prizes of monetary value.
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The games here are for adults only. If gambling or gaming is worrying you or someone close to you, GamCare's free, confidential helpline is open day and night on 0808 8020 133.
close the shutters
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a note from the hall
In that time you have played 0 rounds, and your stardust has moved by 0. Stardust is only points, but time is real.
A note on storage
Orrery Hall sets no cookies and runs no trackers or adverts. Your age answer and this choice are kept in this browser. Accept, and your stardust and Logbook stay on this device; choose Session only, and they are forgotten when you close the tab. How storage works
Signs 12.5×
Elements 4.2×
Halves 2× · sun returns half
10stake
Choose a stake to begin.
A brass wheel with the twelve signs of the zodiac and one golden sun. Back a single sign, one of the four elements or the day or night half of the year, then set it turning.
A slow, pretty instrument for the end of an evening. One bet, one turn, one answer.
The day half runs from Aries to Virgo and the night half from Libra to Pisces.
Long-run return is what the game gives back on average over millions of rounds, checked by simulation. Any single evening can land far above or below it.
These are the exact numbers the game uses. Every round is drawn fresh by your browser's secure random number generator, and nothing that happened before changes what happens next.
| Bet | Covers | Returns | Long-run return |
|---|---|---|---|
| One sign | 1 pocket of 13 | × 12.5 | 96.2% |
| Element | 3 pockets of 13 | × 4.2 | 96.9% |
| Day or night | 6 pockets of 13 | × 2 (sun: × 0.5) | 96.2% |
Fire: Aries, Leo, Sagittarius. Earth: Taurus, Virgo, Capricorn. Air: Gemini, Libra, Aquarius. Water: Cancer, Scorpio, Pisces.
