Tuning fork and solar panel: what they have in common

1. Step 1. Tuning fork — is part of — Quartz clock. Quartz shaped like a tuning fork at 32,768 Hz.
2. Step 2. Quartz clock — evolved into — Atomic clock. The quartz oscillator is tuned to an atomic standard.
3. Step 3. Atomic clock — is used in — GLONASS. Atomic clocks.
4. Step 4. GLONASS — has part — Artificial satellite. Satellites.
5. Step 5. Artificial satellite — has part — Solar panel. Powering satellites.

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