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Loading contentThe universal file format of astronomy — a self-describing container for images, tables, and spectra with a human-readable header of metadata. In use since the 1980s and still the standard way astronomical data is stored and shared.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.