Summary: Score points by landing balls in Astrolabes based on their position. Further positions score more points, and bonuses are awarded for chaining balls together and filling entire positions.

For full rules and detailed examples, see the official rules page.

Base Scoring (by position)

Position	Points per Ball
Position 3 (furthest)	5 points
Position 2	2 points
Position 1 (closest)	1 point

Bonus Scoring

Chaining / Stringing:

Balls must land in adjacent slots within the same Astrolabe position to form a chain. Only chained balls count for consecutive scoring.

• Position 1: +1 per additional chained ball
• Position 2: +2 per additional chained ball
• Position 3: +5 per additional chained ball

Grand Slam:

Filling an entire Astrolabe position with your balls doubles the total points for that position.

Combined Bonus:

If a final ball completes both a chain and a Grand Slam, both bonuses apply.

Don't worry, you can use our simple scorer: Star Cluster Ball Scorer , which does all the calculations for you.

95 points per round (190 points total)

This consists of chaining balls in Astrolabes 3 and 2 to form grand slams, with the remaining marbles creating a chain in Astrolabe 1.

No. Astrolabes can be 3D printed or purchased quite cheaply and secured to almost any table using command strips or even blue tack.

For a more permanent setup, screws can be used. After that, all you need is some marbles and you're ready to play.

Not necessarily. We recommend a table size based on your ball size:

• Length: ball size × 100
• Width: ball size × 66

However, you can play on almost any table size.

If space is limited, you can adjust the game by removing an Astrolabe or modifying the layout to fit your setup.