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[–] 24 points 2 years ago

We do know quite well what our galaxy looks like thanks to great advances in astronomy. To use your car analogy, it would be like using “X-ray”technology to map the exterior from the interior and get a reasonably accurate picture of the shape of our car.

https://www.astronomy.com/science/how-we-learned-the-shape-of-the-milky-way/

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