There is a movie now showing crediting an Astrophotographer. His photographs are Fantastic his name is Rob Prazeres.
“The short version of the process looks like this:
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A motorised mount tracks the sky as Earth rotates, moving in sync with Earth’s rotation so the target stays perfectly framed and steady
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Hundreds of long exposures are captured (often 5-10 minutes each), across multiple nights. I’ll usually shoot through special narrowband filters (for example Hydrogen alpha and Oxygen III) which isolate specific wavelengths of light emitted by the gas in nebulae and help reveal structure that is otherwise far too faint to record cleanly.
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Frames are calibrated (sensor noise, dust shadows, and optical artefacts corrected)
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Everything is aligned and stacked to improve signal to noise
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Processing reveals faint structures while staying faithful to the data (no generative AI of any kind)
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Final delivery is prepared in high resolution formats suitable for film workflows”