Flywheel energy storage and greenhouse: what they have in common

1. Step 1. Flywheel energy storage — has part — Flywheel. A flywheel.
2. Step 2. Flywheel — includes — Reaction wheel. A flywheel.
3. Step 3. Reaction wheel — is part of — Space telescope. Pointing Hubble.
4. Step 4. Space telescope — has part — Solar panel. Solar panels.
5. Step 5. Solar panel — has part — Window glass. Tempered cover glass.
6. Step 6. Window glass — is part of — Greenhouse. It lets light in and holds heat.

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