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How far a spaceship should travel to take a full picture of our own galaxy from the outside?

  • Cameras have lenses that cover different angles, including cameras that can cover 360 degrees, so technically you could take a photo of the entire galaxy without going anywhere. There is no single answer to your question, IMO. – StephenG - Help Ukraine Jun 09 '19 at 00:11
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    Imagine the galaxy as a disk with $\approx$ 40000 light years radius. How far away should you go? – peterh Jun 09 '19 at 00:52

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