{"paper":{"title":"GAIA: Origin and Evolution of the Milky Way","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(4)Copenhagen University Observatory, (5)Torino Observatory, (6)Universitat de Barcelona, (7)CERGA, (8)ARI Heidelberg, (9)Sterrewacht Leiden, Cambridge, Denmark, E Hoeg(4), ESTEC, F Favata(2), F Mignard(7), France, Germany, Gerry Gilmore(1), Grasse, Italy, L Lindegren(3), Michael Perryman(2), M Lattanzi(5), Netherlands), Noordwijk The Netherlands (3)Lund Observatory, P.T.deZeeuw(9) ((1)Institute of Astronomy, Spain, S Roeser(8), Sweden, UK (2)Astrophysics Division, X Luri(6)","submitted_at":"1998-05-13T22:16:16Z","abstract_excerpt":"GAIA is a short-listed candidate for the ESA Cornerstone mission C5, meeting the ESA Survey Committee requirement for an observatory mission, dedicated to astrometry, providing 10 micro-arcsecond accuracy at 15th magnitude. The GAIA mission concept follows the dramatic success of the ESA HIPPARCOS mission, utilising a continuously scanning spacecraft, accurately measuring 1-D coordinates along great circles, in (at least) two simultaneous fields of view, separated by a known angle. These 1-D relative coordinates are later converted to the five astrometric parameters of position and motions in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9805180","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}