Astrolabe mater and heron’s aeolipile: what they have in common

1. Step 1. Astrolabe mater — is part of — Astrolabe. The main disc with a scale.
2. Step 2. Astrolabe — is made of — Bronze. Ancient astrolabes were bronze.
3. Step 3. Bronze — is material for — Heron’s aeolipile. The aeolipile is a bronze ball.

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