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Loading content3D-printing parts and tools in orbit, layer by layer. A 3D printer has operated aboard the ISS since 2014, printing tools and spares on demand and pointing toward a future where spacecraft parts are made in space rather than launched.
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.