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Loading contentThe programs that fly the spacecraft — running the control loops, sequences, and autonomy. Flight software is exhaustively tested, because a bug billions of kilometres away cannot be fixed by hand.
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.
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.