Leo sat in his darkened home office, the only light coming from the dual monitors reflecting off his glasses. On his desk lay a stack of memory cards filled with "lights," "darks," and "bias" frames—the raw, noisy harvest from a freezing night spent in a remote field. To the naked eye, his photos looked like black rectangles with a few grey smudges, but Leo knew the secrets they held.

He clicked Register Checked Pictures. The progress bar inched forward. One percent. Five. The fan on his laptop roared. Deep Sky Stacker was not a gentle program. It was a forge. It took his blurry, noisy, disappointing images and began to beat them against an anvil of mathematics.

Flat Frames: To correct vignetting and dust spots on the lens.

Navigate to the GitHub Releases page and download the executable file (e.g., .exe for Windows, .dmg for Mac). 2. Run the Setup

Installing Deep Sky Stacker: