Thermocouple and multistage rocket: what they have in common

1. Step 1. Thermocouple — is part of — Radioisotope generator. Thermocouples turn heat into current.
2. Step 2. Radioisotope generator — is part of — Space probe. The Voyagers’ RTGs.
3. Step 3. Space probe — uses — Multistage rocket. Launch.

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