Telescope and air conditioner: what they have in common

1. Step 1. Telescope — includes — Space telescope. A space telescope is a telescope above the atmosphere, so air does not blur the view.
2. Step 2. Space telescope — has part — Solar panel. Solar panels.
3. Step 3. Solar panel — is used in — Energy-efficient house. Solar energy.
4. Step 4. Energy-efficient house — uses — Heat pump. Heating.
5. Step 5. Heat pump — is used in — Air conditioner. An air conditioner is a heat pump that carries heat out of the room.

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