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Loading contentAn explorer of the structure of our own Galaxy — its discs, bulge, bar, spiral arms, and halo, and the Sun's place within them. Prepared for a three-dimensional rendering of galactic structure; today it maps the anatomy of the Milky Way onto its components.
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.