Star tracker and computer: what they have in common

1. Step 1. Star tracker — has part — Image sensor. A camera.
2. Step 2. Image sensor — is part of — Digital camera. Instead of film a digital camera has an image sensor.
3. Step 3. Digital camera — has part — Flash memory. A memory card.
4. Step 4. Flash memory — is part of — Computer. Modern computers store data on SSDs with flash memory.

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