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ELI5: How do people take photos of galaxies with 50 hours of exposure? How is it possible to aim at (by Sparky)

 Sparky (0)  (29 / M-F / Massachusetts)
10-May-20 2:20 pm
ELI5: How do people take photos of galaxies with 50 hours of exposure? How is it possible to aim at the same spot while earth is doing more that 2 rotations in that time?


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